宣战理由

Casus belli, 简称 CB, 一个表示“战争借口”的拉丁词语。它代表了其他统治者和宗教领袖认为战争是合法的。

就像在其它P社游戏中的一样，在王国风云2中你需要一个宣战理由来开启战争。CB会决定这场战争的胜利品和战败的惩罚是什么，并且经常会决定谁可以加入这场战争以及你需要怎样来获得战争胜利。

CB系统的原理是：信仰某一个宗教的统治者基于道德上的准则不应该无缘无故地互相开战，否则该名统治者会被视为一名非正义的暴君。而信仰某些原始宗教的领主则不受这一限制，他们可以向任何目标发动战争——如果他们把战火推进的太过分，就会有被其它宗教圣战的危险。

宣战理由和扩张

战争是一种扩张你的领地的主要方式，因为大多数CB可以给你带来新的领土：

• 使用一个个人的宣称篡夺头衔。
  • 使用其他人的宣称，并使其成为你的附庸（如果其头衔等级更低），或者：宣称这是你法理上的附庸，或是你的家族成员，或已经是你的有地封臣。
• 对伯爵领的法理战争，以及征服类的战争，将会“强迫附庸或是篡夺”目标头衔。战胜之后，首先将会尝试将该头衔现有的统治者变为进攻方的封臣，但是如果由于进攻方头衔等级过低（如伯爵级）或者防御方拥有其他地产从而无法附庸的话，那么进攻方将会篡夺该头衔。
• 入侵类型的战争“篡夺占领的领土”除了战争目标领地之外，所有被攻占的地产头衔均会一并被篡夺。
• 圣战会篡夺所有异教徒的地产。

对于一个目标可以有多个CB，每个CB都有自己的目标和对成功的奖励。你通常应该选择回报最大的CB，但是你仍然应该尽可能避免圣战，以减少潜在的敌人数量（由于圣战时防御方同宗教统治着可能会加入防御方），即使有时候会带来很高的回报。

宣称战争

主条目：宣称

可能的结果有：

• 一旦赢得一场宣称战争，你将获得目标头衔并获得100威望。
• 如果以无条件和平结束，你将失去100威望。
• 如果以失败而告终，该宣称将会失去并且同时失去200威望。

对同一个头衔的多长宣称战争会导致所有进攻方互相敌对，如果目标头衔易主（不论是由于另一场宣称战争或是其他原因），宣称战争将会同新的控制者继续进行。

宣称

如果你对某个领地拥有个人宣称，你可以公开这个宣称来篡夺该头衔。

索取所有宣称

拥有多个强宣称(对同一个统治者)的时候可以同时公开宣称它们，这使得宣称者可以在一场战争中获得所有宣称的头衔，而无需等待10年的停战协定（如果分别宣称的话）。

为他人宣称

你也可以替任何你的廷臣或封臣公开他们的宣称。但如果目标头衔是男性继承，你将不能公开女性廷臣或封臣的宣称。

一旦获胜，你所帮助索取宣称的人将获取目标头衔，同时对你好感度将增加100。如果其索取的是公爵以上头衔并且原本没有土地，那么同时将会自动从目标头衔领地撺掇一个省份，并且对你的好感度进一步提升100。

要注意的是，如果你为一个既不是封臣也不是家族成员的的角色公开你的法理领地之外的宣称，他们将不会成为你的封臣。因此，如果你想要通过索取他人宣称来扩张自己领地，可以通过格拉摩根大法——即首先封给其一块封地，使之成为你的封臣，之后再索取他的宣称。不过，如果所索取的是不低于你的头衔等级的宣称，他们依然会独立。

法理战争

当你是一个头衔的法理领主但实际控制者不是你时，你可以选择“法理宣称”为战争理由宣战来夺取法理领地。不同于个人远程战争，法理宣称除非在你失去的法理的更高级头衔，否则永不失效。

当 亚伯拉罕之裔DLC激活时法理战争借口不能对同一宗教的骑士团使用，除非他们已经被驱逐。

伯爵领法理宣称

如果你拥有公国、王国或帝国头衔或者你的封臣拥有公国头衔，你可以对头衔内法理领地内不由你控制的地产的最高君主提出收回法理领地的要求。但是这种借口即使其他势力拥有多个你的法理内省份，你也只能一次提出一个法律省份领土要求。同时这也意味着，作为一个皇帝，如果你的国王封臣不在你的帝国法理内，你就不能帮助其主张法理领土。

如果目标省份的所有者是单省份伯爵，宣称成功后其将会成为封臣。但如果其拥有多于一个省份，或是拥有任何更高的头衔，或是一个贵人，那么目标省份将被篡夺(连同该角色拥有的任何其他该省份地产)。

AI统治者不会对其领主手下的只剩一个省份的其他封臣使用这个宣战理由。因此公爵封臣通常不会“窃取”国王手下的其他直属封臣领地，而是会留给国王决定是否转封这个封臣。

如果战争以胜利告终，你将同时获得100威望，并且如果你是为其他人公开法理宣称，他们将会在20年内增加50点对你的好感。如果战争以无条件和平结束，你将失去100点威望，防御方会获得50威望，并且另外50点威望将会在防御方及其盟友间平分。如果战争失败，你将失去双倍的威望，同时你还需要支付相当于你4年的收入给战争的防御方。

附属地产法理宣称

有时，你或你的封臣的省份中可能会有不受你控制的归属于其他势力或是独立的次级地产（城堡、城市或神殿）。在这种情况下，你将可以公开一个省份中所有被该防御方占有的次级地产宣称。但在这种战争中，威望的失去或获取将为宣称完整省份的一半，如果为无条件和平则威望损失仅仅只是正常宣称战争的四分之一。同时，所宣称的地产将会被直接篡夺而不是被附庸。

这里有几种找出不属于你的次级地产的方式：

• 不再打星际
• 放大并寻找额外的地产纹章
• 点击一个省份并检查是否每个地产右上角的纹章是你的
• 使用“独立国家”列表（统计表的第十页），并按领地大小排序
• 使用“外交关系”地图模式（e）并寻找与众不同的浅色或暗色省份

碧玉之龙宣战理由

这些宣战理由需要碧玉之龙 DLC，并且可以在游戏规则中禁用。通常来说，这些宣战理由代价高昂但同样拥有强力的效果。

法理公国宣称

为争夺一个公爵头衔下的所有省份而战。你必须个人持有该公爵头衔或该公爵领的法理国王或皇帝头衔。为了宣战，你需要花费基于头衔等级的威望（公爵级250，国王级500，皇帝级1000）。

只适用于在同一宗教组中，穆斯林不能使用这个宣战理由对抗其他教派的穆斯林。

强迫臣服

使一个低等级的领主成为你的封臣。 你必须是独立的，并且不能是游牧制政体。你必须拥有对敌方领土的宣称，或者足够的威望：

• 使伯爵臣服需要250威望
• 使公爵臣服需要1000威望
• 使国王臣服需要2500威望

目标领主必须是独立的，领地大小小于31并与你接壤，与你同宗教或者同一文化组。无论信仰如何，都不能对圣职和宗教领袖使用。在十字军期间，这个宣战理由不可使用。

伟大征服

一个强大的领主可以挑战另一个强大的领主来获取一个法理王国，双方都必须是独立的，领地规模大于200,不是游牧政体，头衔为国王及以上。目标王国必须与进攻方接壤，或者通过不大于两个海区相邻。

进攻方需要花费3000威望、1500虔诚来发动战争。此外，还需要防守方兵力至少是进攻方的95%以上（不包括盟友的部队）。

成功后，该王国头衔以及目标角色持有的其法理领地都会被篡夺，失败的惩罚比绝大部分的宣战理由都大。

公国征服

当目标公爵领头衔不存在的时候，这个宣战理由允许你征服你领地所在的公爵法理领地内的其他伯爵领。

战争胜利后，如果可以的话将附庸目标领主，否则将篡夺目标头衔。

你必须花费一年的收入来发起战争。此外，基于你的头衔等级，还需花费虔诚，伯爵需要100虔诚，公爵需要250虔诚。

高等级的领主不能使用这个宣战理由。

穆斯林、原始宗教和游牧民族不可以使用这个宣战理由，因为他们已经有其他的扩张方式。

宗教解放

解放一个王国，该王国内必须有一个伯爵领的宗教与你相同。战争胜利后，该王国将迎来一个与你同宗教的领主，同时成为你的朝贡国。

角色在一些特殊的情况下可以获得此宣战理由。例如，当你第一次选择强化信仰的野心，特别是拥有 和 神学生活重心，可获得此宣战理由。该宣战理由也会随机触发，即使你没有强化信仰的野心。

即使你没有启用碧玉之龙，当你启用神圣之怒，并拥有「能发起宗教解放战争」特质的血脉时，你可以无限次的发动宗教解放战争。

边界争端

你可以选择去入侵任何与你接壤的伯爵领。但是要注意在没有宣称的情况下发动侵略将要付出沉重的代价。

原始宗教使用这个宣战理由需要花费100威望。其他宗教需要还花费钱与虔诚，花费随着你的头衔等级变高及你们的宗教差异变小而变大。

发起这种战争还会得到敌方宗教组对你的好感修正：发动非正义战争 -15。

和平主义宗教不可以使用这个宣战理由。游牧政体及伊斯兰教不可以使用这个宣战理由，因为他们已经有其他扩张方式了。原始宗教只能对同一宗教领主使用。

这个宣战理由可以在开局规则中关闭。

封臣专用

独立

当你是某人的封臣的时候，你可以通过这种战争来实现独立。

• 如果你赢得战争，你将从你当前领主那里独立，并且如果你对抗的领主是国王或皇帝，那么他的王权法将会降低一级。
• 如果你们达成无条件和平，你将失去100威望。
• 如果你失败，你将被囚禁并失去200威望。

跟修改法律一样，你不能通过使用这个宣战理由来从附庸链中直接独立。如果你的领主是另一个更高等级领主的附庸（例如你是伯爵，你的领主是一个国王麾下的公爵级封臣，），那么当战争胜利后，你将成为你前领主的领主的直属封臣而不是直接独立。

与通过派系发起独立战争不同，直接发起独立战争将允许你召唤盟友（同时，防御方也可以召唤盟友）。但是，如果通过派系独立，在派系战争期间，你的派系里的同谋在战争期间将暂时成为你的封臣，以使战争更加协调和真实，同时，你还可以向你的临时封臣收税及要求他们提供征召兵。封臣的封臣不可以发起独立派系，但是可以直接发起独立战争（以便直接效忠一个更高级的领主）。

推翻领主

会在逮捕失败或者剥夺头衔时遭到拒绝后触发。

一旦胜利，领主会强制退位。在没有启动御前会议DLC时，王权法会降低两级。

当逮捕有正当理由时：

• 战争名称为：“反抗<统治者>叛乱”
• 反叛的封臣不会得到临时头衔且其他角色无法加入反叛者这一方

当逮捕没有正当理由，或者是剥夺头衔时：

• 战争名称为：“推翻暴君<统治者>之战”
• 反叛的封臣会得到一个临时头衔，其他封臣有可能会加入叛变（前提是统治者持有公爵或公爵以上头衔）
• 当御前会议启动时，反叛成功会使领地法中的允许剥夺头衔降低至“不允许”

派系宣战理由

主条目：派系

当封臣觉得他们的派系足够强大时可以向领主发出最后通牒。如果领主拒绝服从要求，派系的领导者会作为进攻方发起战争。每种派系要求会获得相应的宣战理由。

派系领导者会获得与防守方相同等级的临时头衔（因此会临时变为独立状态），同时派系成员会变成他/她的临时封臣。临时封臣为派系领导者提供的最小征召兵数将为100%。

宗教宣战理由

通用

圣战

如果你对一个独立的统治者持有“异教徒”或者“异端”好感修正时，你可以向他发起一场圣战来夺取一个公国。穆斯林统治者也可以对同一宗教组下的非异端教派发起圣战，前提是该目标尚未与异教徒处于战争状态（例如：逊尼派统治者可以对什叶派发起圣战）。印度宗教组可以对道教发起圣战。

你必须控制一个与目标公国相邻的省份（或者处于该公国的法理内）。当进攻方或防守方是穆斯林，或者进攻方是基督教徒且十字军已解锁时，则可以相隔2块海域。

这个宣战理由不能用于国内，即当逊尼派统治者和什叶派统治者同属一位领主时，双方不能发动圣战，封臣也不能对同一领主下的异端发动圣战。与领主宗教不同的封臣也不能对外发动圣战，除非两者的宗教为同一宗教组下的非异端教派。原始宗教教改后要求封臣必须信仰领主相同的宗教。

一旦获得胜利，你会得到50点虔诚，以及目标公爵控制的法理伯爵领（必须由你或你的盟友占领，或者曾经属于防守方且未被其他势力占领）如果该公爵持有6块伯爵领（直辖或附庸），而你圣战的目标公国的法理伯爵领只有其中一块，那么你只能成为那一块伯爵领的统治者。如果该公国只是一个名誉头衔，且没有任何法理地产，那么你一块伯爵领也得不到。点击目标公国的盾徽并勾选“法理”选框来查看哪些伯爵领是该公国的法理领土，并检查哪些伯爵领是由当前的公爵控制的：你只能“赢”得同时符合以上两条的伯爵领。

如果某地产的前拥有者和你宗教相同则会成为你的封臣。如果是穆斯林统治者进攻非穆斯林，则所有的封臣将转移至你的名下，即与统治者头衔等级相同或更高等级的地产照常篡夺，低等级地产的拥有者成为你的封臣。该宣战理由无法附庸任何一个宗教领袖，例如教宗，即使你的目标是他拥有的最后一个公国。穆斯林还可以降低腐败度（取决于战争贡献；最大为10%）。

当你无条件和平时，你将失去50点虔诚和100点威望。

当你投降时你将失去150点虔诚和200点威望，同时支付赔款。胜利的一方可以增加3%的宗教权威，持续20年；失败一方则降低3%。如果穆斯林作为进攻方输掉了一场圣战则会增加腐败度，除非有家族成员是其领主。

这项宣战理由对大部分宗教的统治者是可用的，除了以下情况：

• 未改革原始宗教没有圣战。
• 改革原始宗教（和未改革阿兹特克多神教）有一个更强力的圣战版本，允许对2块海域间隔内目标发动圣战，允许对其他原始宗教圣战，允许游牧制政体发动圣战，圣战结束后停战协议只有5年。但是这种宣战理由需要花费100虔诚。
• 耆那教没有任何形式的宗教战争。
• 佛教必须花费250虔诚才能使用此宣战理由。
• 道教不能使用此宣战理由。
• 统治者不能在参与一场收复失地运动时使用此宣战理由。

在发起宗教战争时，需要时刻记住一下几点：

• 与防守方相同信仰的统治者有可能会志愿加入防守。进攻方要确保目标附近相同信仰的统治者正在忙于自己的战争，才不会腹背受敌。AI统治者倾向于加入邻国的防守战争，或者两国首都的距离小于200。
• 防御方有可能会皈依入侵者的宗教。这会使宣战理由失效，胜负未分地结束战争（你从中捞不到任何好处）。在你的战争分数达到50%时，AI统治者会每月考虑一次是否执行这个决议，所以尽快将你的战争分数提高到100%。当防守方的宗教权威十分低时他们更加可能会皈依你的信仰。
• 防守方拥有足够虔诚时有可能会雇佣骑士团（尤其是天主教，因为他们不止只有1个骑士团）。你可以使用角色查找器搜索头衔来查看骑士团是否已成立，以及是否已被其他人雇佣。

圣战同样可以用来对抗同宗教组下已知的恶魔崇拜者成员，前提是进攻方不是已知的恶魔崇拜者。输掉一场对抗撒旦教徒的圣战不会降低宗教权威。

十字军

主条目：十字军、吉哈德和大圣战

这是一个特殊的宣战理由，只能由宗教领袖在该宗教至少有5%宗教权威时使用。它把一个由异教徒或异端控制的王国的所有法理领土作为目标。相同宗教的所有统治者都可以加入战争，无论独立与否。一旦获得胜利，土地将由以下方式瓜分：

• 如果该王国的头衔已经被一个相同宗教的统治者持有，则该统治者获得所有的领土。
• 如果该王国的头衔被不同宗教的统治者持有（例如，在一场逊尼派目标安纳托利亚的吉哈德中，安纳托利亚的控制者是东正教的拜占庭皇帝），所有土地将授给相同宗教中该头衔的宣称者（强宣称优先于弱宣称）。如果没有相同宗教的宣称者存在，则由战争贡献最高者获得所有土地。该王国头衔可以事后由实际控制者和平地篡夺。
• 如果该王国的头衔不存在，则会立即创建且授予给战争贡献最高者。

同时，进攻方宗教的宗教权威会增加20%，持续20年，参战者将按照战争贡献比分摊500虔诚和1000威望，而失败的一方失去100虔诚且宗教权威降低20%。和圣战一样,防御方如果是原始宗教或祆教则可以通过决议转变为进攻方的宗教，使十字军无疾而终。

当无条件和平时，进攻方失去5#宗教权威和100虔诚，防御方获得2.5%宗教权威，200威望和100虔诚。当十字军失败时，进攻方失去10%宗教权威和200虔诚，防御方获得10%宗教权威，防御方领导者获得100虔诚，同时所有参战者分摊300威望和150虔诚。

天主教十字军和穆斯林吉哈德将在11-12世纪解锁，如果圣地被异教徒占领则会更早。原始宗教改革后会在十字军或吉哈德中任意一个解锁后解锁大圣战。 犹太教和祆教的大圣战会在各自的宗教领袖恢复后立即解锁。小兄弟会十字军和伊巴德派、雅兹迪派、胡儒非派和哈瓦利吉派吉哈德会在宗教领袖成立后，分别在十字军或吉哈德解锁后解锁。东方宗教和东派教会（东正教、基督合性派和聂斯脱里派）没有任何形式的大圣战。

如果防御方的领导者死亡或被推翻，战争就会无疾而终。

准许入侵

天主教，犹太教和祆教的统治者可以向他们的宗教领袖请求宽恕一场对同一信仰、宗教领袖下的另一个法理王国的入侵。你必须拥有对目标主头衔的宣称或者领土规模小于目标。这需要花费500虔诚（当拥有教宗神职叙任权，仅需要250虔诚）同时只有宗教领袖对你的好感高于目标时才有可能授予你这个宣战理由。

获得胜利时，你会得到请求入侵的王国头衔，400威望和每一个被你占领的地产，省份首府被占领的伯爵领内地产同样也会归你所有，同时获得“征服者”称号。因此，在强迫对方从命之前你最好把每一个伯爵领都占领了，这样你就可以安插自己的贵族。如果你无条件和平了，你将失去100威望。而当你投降时，你会失去200威望，并支付赔款，同时你也会失去对该王国的宣称。

这项宣战理由对天主教徒最为有用。因为大多数的东正教国王拥有自主神职叙任权，而犹太教和祆教必须先恢复宗教领袖。

如果目标死亡，这个入侵宣称将会消失。

被绝罚的统治者

如果与你拥有相同宗教领袖的统治者受到了绝罚，你可以向他/她开战。胜利后，根据被绝罚者的头衔等级给予你10至70点虔诚和50至400点威望。目标会解除绝罚并被迫退位（给继承者）。无条件和平会使你失去50虔诚和100威望。输掉战争会失去100虔诚和200威望，同时你还要支付赔款。

基督教

废黜对立教宗

承认“正统”教宗的天主教徒可能会攻击任命了对立教宗的统治者。当进攻胜利后，对立教宗将被罢黜（意味着他将失去对教廷的宣称；他仍将保留主教头衔）并且胜利者获得500威望，250虔诚和教宗对他/她大量的好感加成。失败的一方会失去大量威望和虔诚。而如果进攻方失败则会失去威望并支付巨额赔偿。

收复失地运动

伊比利亚文化组的统治者一生可以使用一次“准备收复失地战争”决议来解锁特定公国的特殊宣战理由。冒险家也可以使用这类宣战理由。 这个决议需要花费500威望，250虔诚和200金钱。 开始决议后会在首都生成一队450至600人的事件部队，免维护费且无法增员。

当你开战之后目标公国的轮廓将会显示出来。下表是所有可宣战的公国（注意：只有接壤的目标公国会显示在宣战理由中）：

宣战理由	目标公国	获得所有目标公国后可获得王国
莱昂的收复失地战争	莱昂，阿斯图里亚斯	莱昂或者阿斯图里亚斯（都是非名誉头衔）
卡斯蒂利亚的收复失地战争	卡斯蒂利亚，托雷多	卡斯蒂利亚
阿拉贡的收复失地战争	阿拉贡，巴塞罗那	阿拉贡
加利西亚的收复失地战争	加利西亚，波图斯卡莱	加利西亚（如果不是名誉头衔）
西海岸的收复失地战争	贝雅，阿尔加维，里斯本	无
南伊比利亚的收复失地战争	格拉纳达，塞维利亚	无
中伊比利亚的收复失地战争	科尔多瓦，巴达霍斯（又名埃斯特雷马杜拉）	无
东海岸的收复失地战争	瓦伦西亚，穆尔西亚	无
纳瓦拉的收复失地战争	纳瓦尔	纳瓦尔
巴利阿里群岛的收复失地战争	马略卡	无

在开战之前的两年时间内将会有一系列事件帮助你准备战争。例如，你可以选择用多少虔诚来换取金钱（比如用100虔诚换取一年的收入，300虔诚换取两年的收入，又或者拒绝向教宗索要援助以获得50虔诚），选择花费多少金钱换取事件部队（比如用50威望换取300轻步兵，用100金钱换取300轻步兵和100弓箭手等），或是购买无维护费且无法增员的事件船只（100金钱换取10艘船，200金钱换取20艘船和100威望，或者选择不购买船只）。

胜利时，进攻方（或者他们选定的受益人）会获得目标公国内防守方控制的土地。目标公国将会创建或者篡夺（除非头衔被非目标持有）。如果获得了所有提及到的公国，对应的王国头衔也会被创建。失败的一方将会获得该王国的强宣称，且可继承（似乎不会获得公国宣称？）。可能获得 收复失地血脉。

收复失地运动与其他的宗教战争是相互排斥的，你不能在使用此宣战理由时使用其他的宗教宣战理由。

北方十字军

条顿骑士团可能会宣布与北方的非基督教徒开战。这场战役将围绕某一个法理王国内的一系列公国头衔战争组成。需要启动神圣之怒DLC并且只会在1150年后发生。

一个独立的天主教统治者可以向骑士团建议一个进攻目标。建议目标必须是独立的且持有一个位于{北欧，东波罗的或罗斯地区}的王国或更高等级的头衔。如果没人提建议，条顿骑士团会在5-10年后自己选择一个目标。第一个目标一定是一个公爵或更高级别的统治者；随后的目标必须在第一个目标所在的法理王国内持有领土。

一旦条顿骑士团获得胜利，他们会接管被征服的土地。同时第一次获得胜利时会将头衔升级为王国等级的条顿骑士团国。如果输掉两场战争，骑士团会取消这场战役。

加入北方十字军的统治者会得到150虔诚并根据战争贡献得到追加奖励：达到1%时可以获得150虔诚；达到20%时可以获得金钱；达到40%时可以获得宝物。如果一位统治者在三场战争中战争贡献最高，他/她将建立一条北方十字军血脉，这将允许他/她或后代附庸条顿骑士团或条顿骑士团国。

教宗战争

为了教皇的公国级战争（需要神圣之怒DLC）

獨立的國王或是皇帝幫助教宗收服教宗屬地 (拉丁姆、斯波莱托、安科那、费拉拉或贝内文托公国）。目標必須是有效的聖戰目標（異教徒或異端），被開除教籍的統治者，或同一宗教且與教宗關係低於-50的非神權統治者。

教皇可能要求進行這種戰爭作為加冕的條件。 這也是增加教皇好感的好方法或者可以从教皇那里获得一件工艺品作为礼物。

伊斯兰教

入侵（伊斯兰教）

如果一个异教领主在某个法理王国内控制了至少6块伯爵领，穆斯林就可以花费1000虔诚对其发起入侵，以夺取对手在该法理王国内的所有领地。和穆斯林圣战一样，“异教” 也包括其他教派的穆斯林，例如逊尼派对于什叶派。攻击者必须与目标法理王国接壤或者拥有该王国内的土地。游牧民不能使用穆斯林入侵;他们以游牧民族入侵代替。

一旦入侵成功，对于在目标法理王国之外还拥有土地的领主，你会被授予他们在该王国内的土地；对于其余的领主，公国头衔会被摧毁，他们会成为你伯爵或男爵级别的封臣。入侵不会直接篡夺公国及王国头衔，你需要在这之后自行篡夺或创建它们。新的附庸将与您获得+75的暂时性关系修正？，使请求其转教变得非常容易。不同于其他的入侵，你只能获得战争目标的地产; 战争的失败者还能保留战争目标以外的地产。

与圣战相同，战争目标的相同信仰邻国会（并且有较强意愿）加入它的防守战争。防守战争中的原始宗教和祆教统治者可以在决议中假意改信进攻方的宗教，使战争毫无结果地结束。

伯爵领征服（伊斯兰教）

伊斯蘭領主可以奪取與自己領土接壤的任何伯爵領。CB需要花費50虔誠，但可以用於任何目標公爵領。 勝利後可以奪取該伯爵領，或（如果該領主屬於一地伯爵，並且您是公爵或更高級別頭銜）該伯爵將成為你的附庸，並獲得100威望。無條件和平將失去100威望。投降將失去100威望並支付賠償。 休戰條約僅維持5年。

哈里发征服

每隔10年, 伊斯蘭領主哈里发 可以征服相同教派的穆斯林王國。 成功後，被征服的目標王國下屬附庸將成為攻擊者的附庸。 如果有人擁有該目標王國以外的領土，他們並不會被附庸 ，但他們在目標王國內的頭銜將會被篡奪。

休戰條約僅維持一年。 尽管这条宣战理由不能篡夺所有占领的头衔, 进攻方可能不会接受提前投降， 这可能是个bug。

根據CB文件，游牧政體不能使用哈里發征服。 他們改用游牧入侵。

腐化夺权

伊斯蘭領主可以使用此CB篡奪具有特性的近親頭銜。

原始宗教宣战理由

取决于具体情况原始宗教不论你是否已改革 (需要有 ), 这些不同的CB适用于不同的统治者.

伯爵领征服（原始宗教）

類似於穆斯林的CB，但僅可用於不同宗教的目標，且無需花費任何虔誠。 所有原始宗教領主可以征服接壤的伯爵領，且當800年發生“維京時代的開始”事件後，諾斯教徒也可以征服任意沿海的伯爵領。勝利後，除了獲得50虔誠和威望還會給予1％的宗教權威持續20年。 就像穆斯林的CB一樣，休戰條約僅維持5年。

游牧制无论信仰如何，都可以使用征服伯爵领。但是非原始信仰的游牧民只能对其他宗教的游牧民或部落民使用此CB。 注意，与您的目標同一宗教的統治者可以加入对您的战争，就像公爵圣战及更高版本一样。工具提示中没有此信息，因此请小心。

入侵

这个强大的宣战借口可以将战争目标设定为整个法理王国，由于这是一次入侵，在入侵胜利之后，所有占领（或被占领）的土地均不会退还给被入侵的一方。

It is available for rulers who have tribal government or elective gavelkind succession, if they also have appropriate religion and culture:

• Without the Horse Lords DLC: it can be used by Pagans with Invasion culture (Altaic or Magyar) and non-Christians with Horde culture (Mongol or Nahua). Pagans cannot be targeted except by Horde culture attackers.
• With the Horse Lords DLC: it can only be used by Pagans; requires Altaic, Magyar, or Nahua culture; and can never be used against Pagans.

It is also available for:

• Special hordes
• Landless mercenaries who were not paid
• Child of destiny
• Alexander or Ashoka bloodline (once per lifetime, NOT refunded if the war becomes invalid)

Declaring a Tribal Invasion costs 500 prestige, but the attacker receives 400 prestige upon success (with 100% war contribution).

Nomads cannot use this CB. Instead, they can use Nomad invasion when their population is 75% of its maximum and at least 30000.

原始宗教征服

Pagans (except Hellenics) with either a tribal government or elective gavelkind succession, may target all land in a de jure kingdom held by another pagan. On success, all holdings are vassalized or seized, and top-level non-titular titles are seized if they are of equal or higher rank than the invader's top title. The conqueror gets an opinion bonus from the vassals he subjugates. Reformed Pagans lose this CB, and are also protected from it, except from attacks from the unreformed version of their own religion. The truce lasts only 1 year.

A character may only use this CB once in their lifespan, except with the "Become King" ambition, which allows unlimited usage within the capital's de jure kingdom. If a character is already being targeted in a subjugation war it invalidates that character as a target for another subjugation war.

准备入侵

Certain Pagan rulers can declare their intent to attack a realm, and recruit followers from all over Scandinavia during a special preparation phase.

Prepared Invasions are available for:

• Unreformed Germanic Pagans, after the "Viking Age" event in the year 800
• Reformed Germanic pagans (without Holy Fury)
• Reformed pagans with the Daring or Sons of Ragnarok doctrines (with Holy Fury)

The target realm must have between 9 and 50 holdings within the target de jure kingdom. The attacker must have 1000 prestige and fewer than 50 holdings. During the two years after the invasion is announced, the preparing ruler has a chance to receive free troops and ships. The recruited army scales with the size of the ruler's existing army, and also tends to be larger with:

• 7, 10, 15, and 20 martial skill
• 7, 10, 15, and 20 diplomacy skill
• 100 and 1000 prestige
• Higher rank than count

Recruits show up slowly if the attacker has twice as many troops as the target realm and very slowly if the attacker has three times as many troops. Recruits do not show up at all if the attacker has four times as many troops as the target realm.

Since the recruited army scales with the size of your existing army, you should increase your strength by all possible means during the period before the invasion. At the very least, your capital should have the "train troops" and "fleet returned with loot" bonuses to levy size. Consider raising tribal prestige troops, hiring mercenaries, or even leading a faction rebellion.

Most of these event troops are earmarked for the invasion and will disband if the invasion is canceled or if the invasion war ends. However, some of the event troops (those that arrive with a hero commander) are not earmarked and can be retained. If the war becomes invalid due to the attacker no longer controlling any titles in the target kingdom, all event troops will be retained.

As with Holy Wars, neighbors of the target who share their religion can (and very likely will) join in defense. Not declaring war within two years cancels the invasion and has a heavy Prestige cost. On success in the war, occupied holdings and holdings in occupied counties are usurped, and any remaining titles in the named target kingdom are vassalized. Conquered holdings do not get the "recently conquered" penalty and have their levies refilled immediately. Only usable once per ruler's lifetime. The truce lasts only 1 year.

If you start as one of the British Sons of Ragnar in 867 (Halfdan Whiteshirt of Jorvik or Ivar the Boneless of Suðreyar), you will begin immediately following their declaration of a prepared invasion and this CB will not be available to your starting character afterward.

Prepared Invasion will be canceled if:

• You die
• You have any troops in target realm before declaring war
• You have raided target and target is still hostile towards you. After a raid hostile timer is 180 days.

荣冠战争

Used by Aztecs or any reformed pagan religion with the "Bloodthirsty Gods" doctrine. The attacker must have the 3rd tier trait, Haemoarch. Requires Holy Fury DLC.

On success, some non-ruler members of the ruler's court are sacrificed. Provinces of the defender's demesne, as well as those of their direct vassals, get a modifier for 10 years severely reducing levy size. The attacker's religion gets +3% moral authority for 30 years.

母系废黜战争

A reformed pagan whose religion has the combination of the "Warmongering" nature and the "Enatic Clans" doctrine may declare war to depose a neighboring male ruler.

On success, a woman from the defender's dynasty will be chosen to rule the title. Women are excluded if they are incapable or follow a religion with the opposing dogma "Agnatic Clans". If there are multiple candidates, it strongly prefers women of the attacker's religion and prefers close relatives of the defender. If there are no valid dynastic candidates, a vassal will be chosen, or a new female character will be generated.

The realm will also be forced onto enatic succession and full status of women (unless the new ruler's religion uses the semi-opposing equality dogma). Finally, the realm will become the attacker's tributary (if not already a tributary and with appropriate DLC) or non-aggression pact partner.

Although this CB does not always expand the territory of the attacker's religion, it counts as a holy war for moral authority and the "strengthen religion" ambition.

This CB requires that the ruler declaring the war has a king-tier title or higher.

父系废黜战争

Opposite gender version of above, for pagan religions with combination of the "Warmongering" nature and the "Agnatic Clans" doctrine.

印度宗教

印度征服

Rulers of the Indian religions (Hinduism, Buddhism, Jainism) may subjugate de jure kingdoms held by other Indian rulers. Costs 500 piety, and is only usable on targets of the same culture group. The truce lasts only 1 year.

A character may only use this CB once every 100 years, except with the "Become King" ambition, which allows unlimited usage within the capital's de jure kingdom.

伯爵领征服（佛教）

Buddhists can attempt to vassalize a single county from another religion group or from Taoist. The targeted county must be bordering, or be within two sea zones. The truce only lasts 5 years.

While called a "minor holy war" in game, this is deceptive as it does not affect moral authority and does not allow the defender's coreligionists to join.

While smaller than the duchy-level holy war freely available to Hindus, this CB has advantages if the targeted county is held by a count who holds no other county titles. You can revoke the title from the holder (using religious control law) and have a county that is immediately productive, rather than having a severe conquest penalty to levies.

You can also use this CB to gain control of infidel claimants. A second war, using the claim-for-other CB, can then net you an entire kingdom. With Muslim neighbors, there is even the possibility of gaining control of the ruler's sons or grandsons, letting you game their open succession by granting a kingdom.

朝贡国

朝贡-宗主关系是一种不对称的契约关系，它会赋予宗主国对朝贡国的一系列权力。朝贡关系有三种形式，每一种都有不同的税率和召唤加入战争的规则。

宗主国不能向其附属国宣战。然而，只要双方都处于和平状态，宗主国可以选择释放其朝贡国，以便再次攻击他们。朝贡战争结束时签署的停战协议仅持续一年，并且释放朝贡国并不会产生新的停战协议。朝贡国不能加入针对其宗主国的防御条约。

在朝贡战争中，防御方有时会提前投降，这可能属于以下两种情况：

• 在朝贡战争开始时，防御方生成的事件中有一个选项可以选择投降。拥有 , , , 和 的统治者绝不会选择就此投降。而 或 的统治者则更有可能选择投降。并且如果统治者拥有足够实力（包括盟友）进行防御的话也不太可能选择投降。
• 在朝贡战争中的任何时点，防御方通过权衡战争分数情况以及defender_ai_defeat_worth来选择是否投降。如果朝贡国目标在地理上过于遥远、 防御方统治者拥有 // 特质、防御方是国王，这些因素会使防御方更不倾向于投降。

逼迫纳贡

On success, the defender becomes a (normal) Tributary of the attacker at a tax rate of 40%. This type of tributary can be called to war and cannot unite with other tributaries, but always breaks free upon the suzerain's death.

Requires Horse Lords DLC. Requires a border or being at most 2 sea zones away (similar to holy wars). The attacker must not be a tributary (except imperial) and must be independent. The defender must be an independent count or above, cannot be the representative of an off-map power, and cannot be already participating in another tributary war.

Nomadic and tribal rulers get special opinion bonuses with their vassals after winning this kind of war. Primarily used by nomads against the richer government types, but occasionally used by rulers of other government types when other CBs are unavailable. Since the tributary relationship ends upon the suzerain's death, re-using this CB is a great way to gain prestige upon succession.

建立朝贡关系

On success, the defender becomes a Nomad Tributary, a type of tributary that pays 50% tax and grants the suzerain +0.3 monthly prestige. This type of tributary can be called to war, and only breaks free if the suzerain has negative prestige.

Requires Horse Lords DLC. Has similar requirements as Extort tribute, with the additional requirements that the attacker must be nomadic and that this CB cannot be used to steal tributaries from your own vassals. Can be used against realms that border a tributary of the same type, even if they are not otherwise in range.

建立朝贡国

On success, the defender becomes a Tributary State, a type of tributary that pays 20% tax and transfers 15% reinforcement rate. This type of tributary cannot be called to war, but can call their suzerain to war. This type of tributary has many ways to break free: if the suzerain has negative prestige, ceases to be independent, has a smaller realm size, or declines a defensive call to arms from the tributary state.

Requires Jade Dragon DLC. Can only be used by non-nomadic rulers. The attacker must have 200 prestige and cannot have a smaller realm. Requires Majesty 4 in Europe (region) and Majesty 2 elsewhere. Can be used against realms that border a tributary of the same type, even if they are not otherwise in range.

The tributary will also break free if the current ruler is overthrown (e.g. from a decadence revolt). This will not happen with regular inheritance.

脱离朝贡

Tributaries can use this CB to attempt to free themselves from tributary status. Tributaries cannot declare any other type of war against their suzerain. As wars for independence, these wars have ticking warscore in favor of the attacker as long as the attacker controls all their holdings.

Permanent tributaries can unite in an attempt to free themselves, as in an independence faction war. Normal tributaries can only fight alone and risk other tributaries joining their suzerain.

In the rare case that a tributary becomes a vassal of another realm, their liege can also use this CB on behalf of their vassal.

中国

服从

该宣战理由可由中国或中国叛军将领使用，以征服另一个王国。侵占伯爵领直到达到分数要求，从而强迫附庸防御者。

如果防御者不是皇帝，他们将成为封臣，并篡夺他们的王国。如果防御者是皇帝，则他们的附庸将成为攻击者的附庸，防御者的帝国头衔将被摧毁，防御者将成为附庸。

建立朝贡国（中国）

该宣战理由仅西域都护府可用。一旦西域都护府胜利，被宣战者将成为西域都护府的一个朝贡国。这类朝贡国需要缴纳50%的税收和30%的兵力。被建立朝贡国者每月将失去按头衔等级计算的声望，但每月获得+2的皇恩，可以雇佣中国援军。如果中国卷入内战或女真/蒙古南侵，可以通过决议脱离朝贡关系。

消灭伪朝

中国用来消灭伪朝的CB。（伪朝：由中国叛军将领使用服从CB创建的王国。）

强迫中国开放

用来对付西域都护府，迫使中国结束闭关锁国政策，通过丝绸之路恢复贸易。

由于这是一场针对中国的战争，战争分数可以完全由战争决定，而不能完全由占领西域都护府决定。无条件和平是不可能的。

一旦成功，将得到很多皇恩和财富，中国被迫将政策改为开放。

粉碎领土

当玩家使用“请求入侵”天朝互动时，由中原王朝对被宣战的国家使用。有时被中国玩家用来恐吓中原王朝开放丝绸之路。

入侵中国

可以用于将您的亲属推上天朝皇帝的宝座。

值得注意的是，输掉这场战争将导致攻击者的王国被粉碎。

特殊

帝国再征服

一种仅适用于已恢复的罗马帝国的清理宣战 ，其目标是历史罗马帝国的一个公国。攻击者必须信仰基督教组或文化为希腊，防御者不得是穆斯林。

成功后，对目标公国中的统治者进行附庸（如果无法附庸，则篡夺其头衔）。如果土地宣战者占领，还可以篡夺已创建的公国头衔。

此宣战理由可能针对的领土不一定与获得罗马省事件所需的土地或收回旧帝国边界所需的土地相对应。根据1066年法理帝国的划分，可以在以下法理帝国中的国家的边界​​内使用该宣战接口：

• 拜占庭帝国-安那托利亚，亚美尼亚，保加利亚，克罗地亚，希腊，塞尔维亚，特雷比松，色雷斯，伊庇鲁斯，塞浦路斯，阿马尔菲（缺少格鲁吉亚）王国
• 阿拉伯帝国-非洲，埃及，耶路撒冷，毛里塔尼亚，叙利亚（不包括阿拉伯，也门）
• 大不列颠帝国-英格兰王国，威尔士（不包括爱尔兰，苏格兰）
• 法兰克帝国-法国阿基坦，布列塔尼，勃艮第，法国
• 神圣罗马帝国-巴伐利亚，弗里西亚，洛萨林吉亚，卡林西亚（不包括德国，波西米亚）
• 西班牙帝国-安达卢西亚，阿斯图里亚斯，阿拉贡，卡斯蒂利亚，加利西亚，莱昂，纳瓦拉，葡萄牙，巴达霍斯，巴伦西亚王国
• 意大利帝国-意大利，西西里，撒丁岛和科西嘉，威尼斯，比萨，热那亚，罗马涅王国，教廷属邦
• 没有最初的法律帝国：
  • 教廷
  • 安条克王国
  • 瑞士王国

上面的每个王国都可以作为目标，无论它属于哪个法律帝国。请注意，如果上述任何一个王国的法律上的领土发生了变化，那么可以使用CB锁定的公国也将发生变化。

昭昭天命入侵

这种CB只能由帖木儿王朝和1200年以前的塞尔柱王朝使用。它的目标是波斯、拜占庭或阿拉伯帝国法理上的的一个王国。目标王国必须控制目标王国内至少3个省份。

仇敌

羞辱和监禁一个是仇敌的统治者。这是针对某人而不是他或她的头衔：胜利时，目标仇敌被胜利者监禁，但没有领土易手。除了获得声望和财富之外，这几乎没有什么直接的效用，但也有一些附带的好处，比如迫使摄政，允许仇敌的头衔被弱宣称索取。

在一个共和国内，这种宣战对提高声望也极为有用。因为每当休战期满时，连续压制仇敌家族的效果非常突出，可以提高声望，足以在一场势均力敌的竞选中击败非仇敌家族。

解救俘虏

玩家可以为处于强制性纳妾或逮捕中的无地角色使用该战争借口。被宣战者可以通过这种方式被迫释放攻击者的亲戚、朋友、配偶等。 不像其他战争, 这种战争借口也可以消除被拘禁角色的人质性质。

防御方可以选择立即释放, 处决一个或所有俘虏 (包括妾), 亦或者只简单的接受战争。请注意，即使俘虏被处决，也不会结束战争!

在胜利的情况下, 战败者将赔付相当于三年收入的战争赔款，并释放俘虏。强制性纳妾将终止并且婚姻破裂 (和角色在同领地)。囚犯也将被释放。被解救的角色将加入你的宫廷除非她们还是有地角色的妾或妻子。所有被解救者还将对他们的恩人有额外的好感加成。

政体宣战理由

商业共和制宣战理由

夺取贸易站

贵族和商业共和国互相攻击或对抗外国的CB。不能用来对抗同一等级且少于你2个或更多贸易站的贵族。成功后，您将获得目标贸易站。 失败时，您需要赔偿。休战仅持续5年。你必须有一条开放的贸易站线路以要求目标贸易站。有时，当战争结束时，贸易站被摧毁，在这种情况下，你需要自己建立贸易站。也可以用来对付封建王国，如果他们在丝绸之路或跨撒哈拉贸易上保持贸易站。不能用来夺取位于敌方王国首都且在丝绸之路上的贸易站。

城市征服

1.09添加的一个仅限共和国使用的CB。贵族和总督都可以使用。如果你或你的封臣贵族控制了一个省份的贸易站，则可以使用。目标是省内的一个城市。如果在封臣的贸易站所在伯爵领使用，由封臣而不是你得到该城市。城市征服CB不能用于对抗和你在同一等级的角色。

伯爵领征服（共和国）

仅限共和国的单一伯爵领征服，仅当您（或您的封臣）已控制该省份的一个城市时才可用。 你必须要么控制一个相邻的伯爵领，要么控制至多两个海区之外的一个伯爵领。尚未拥有伯爵领的贵族不能使用此CB。

禁运

此借口可以用于对抗在您领地内有贸易站的商业共和国和他们的领主(如果有的话)。如果您赢了, 每个在您领地内的战败者的贸易站皆被摧毁并给你一笔可观的收入。不像其他战争借口， 您只能在和平的时候使用它。

游牧制宣战理由

Nomads have access to Establish Tributary, and the following exclusive CBs. While they also can use the pagan county conquest CB regardless of religion, non-pagan nomads can only use this CB on other nomads and tribals.

游牧征服

This CB allows Nomads to subjugate non-Nomadic realms. Empires can only be targeted by emperor-level nomads (khagans).

When subjugating a realm that broke away during Nomadic Succession, the CB is completely free. This is controlled by the opinion modifier "-50 Declared Independence", given to the new khagan toward the breakaway ruler and their dynastic direct courtiers and vassals.

Otherwise, it costs 500 prestige and can only be used once every 100 years. If the war becomes invalid, the launched_subjugation timer is refunded, but the prestige is not.

Although religious heads (such as the Pope) can be targeted by this CB, they won't become your vassal (in the recent version of 2.8.3.1, unlike in the past it was possible), all their demesne holdings will be usurped instead.

游牧入侵

Can be launched by nomads whose is at least 30,000 and 75% of max. Consider granting some lands to fellow clans in order to reach the 75% needed for the invasion; the Humiliate CB can also steal population from another nomad. Costs 100 prestige.

According to CB files, Nomad invasion works like a crusade. It targets a de jure kingdom; all land occupied by your vassal/allies/tributaries will be usurped by yourself (even if outside the targeted kingdom). Titles in the target kingdom held by the defender which are unoccupied will be vassalized instead.

臣服

Also known as "Nomad Expansion", this CB allows any Nomad to vassalize non-nomad or usurp nomad holdings of an independent ruler within a single de jure duchy. It costs 300 prestige. The defender can call (and can be joined by) rulers of the same faith just like in a Holy War. It has a 10 years truce, contrary to a 5 years truce for county conquest or reformed Tengri holy war.

游牧争端

Feuding clans can declare wars against each other to seize a single county. A Khagan cannot use this CB against a vassal clan. Cannot be used against a Nomad's capital or a county that contains a temple/castle/city.

次级部族反叛

If a khagan has the “clans want more land” alert and less than maximum number of clans, a rebel clan will emerge from one of the khagan's demesne. If the rebel clan is sucessful, they will become a vassal khan, their capital being the county they emerged from, and they also gain any counties they occupied.

拥立可汗

一个可汗宣称者可以用这个CB来代替他的汗位成为可汗。它要么是由于拒绝一个暴虐的行动，要么是因为作为“推翻可汗”派系的领导人发出最后通牒。一旦成功，战争领袖篡夺了帝国等级的头衔，并监禁了之前的可汗。

羞辱

此战争借口被用于对抗其他游牧领主，以窃取他们300威望和25%的人口。此借口对于想达到75%人口以使用入侵战争借口的玩家非常有用。

（从游牧制下）解放公国

Non-nomads can use this CB to take a duchy from a nomad realm. This requires a county in the target kingdom, a border, or being at most two sea zones away. The duchy must either be outside the Steppe region, or contain a non-temple settlement (castle, city, or tribe).

On victory, this vassalizes non-nomadic rulers and usurps other titles. Vassalized rulers will get a +40 "Subjugated" opinion buff towards their new liege.

AI rulers are more likely to use this CB when the duchy contains castles or cities, since they'd rather not have to deal with unproductive provinces and nomad agitation.

破碎世界宣战理由

兼并

Wage war for a single county that is adjacent or accessible over a single sea zone. A game rule controls whether this CB is available for 25 years, 100 years, the entire campaign, or not at all.

伟大征服者入侵

A kingdom-level invasion CB usable only by the Great Conquerors generated at the beginning of a Shattered World game. A game rule controls how many Great Conquerors are generated across the map.

触发型战争

These CBs cannot be used by the player, but are triggered by events. In each case, a large army appears under the command of a landless leader. On success, the ruler takes all occupied territory, and possibly higher-level titles as well.

叛乱

主条目：叛乱

Without The Old Gods DLC, revolts take the form of a leaderless army that's hostile to everyone, but not at war with anyone; sometimes they will capture a province, but just as often they will disperse. With the DLC, though, they actually have leaders with titular rebel titles and they declare war on you with a special CB. There are three types:

• Nationalist rebels (e.g. "Persian Liberation Revolt") appear in foreign-cultured provinces that were once part of a kingdom or duchy of the province's culture. They are usually quite large and the leader has the Inspiring Leader trait. On success, the leader becomes an independent ruler of the culture. with the kingdom or duchy title and the nickname "The Liberator."
• Religious rebels (e.g. "Persian Zoroastrian Uprising") and heretic rebels ("Persian Manichean Uprising") are two different types, but similar. They appear in provinces of heretic or infidel religions. In the case of a heretic revolt, the leader has the Heresiarch trait. They are medium-sized. On success, the leader becomes a duke-level independent ruler.
• Peasant rebels (e.g. "Shirazian Peasant Revolt") appear in rebellious provinces not meeting either of the above criteria. They are relatively small and the leader has the Peasant Leader trait. On success, he becomes a count-level independent ruler.

In all three cases, the truce from the war lasts only 1 year. Except for peasant revolts, they usurp all occupied counties and their minor holdings, like a tribal invasion.

冒险家

主条目：冒险家

Landless claimants to a title may declare their intention to press their claim and recruit an army. Norse, Frankish and Norman nobles without any claims may also attempt to conquer a coastal duchy. In both cases, assassinating the leader before the war starts stops the invasion. When the war starts, the adventurer gains a duchy-level titular title named after him (e.g. "Arnulf's Host"; if he's pressing a claim, the war is called e.g. "Arnulf's Host Claim on Sicily War", otherwise "Arnulf's Conquest of Sicily" which is a special CB). Adventurers have fairly large armies (typically about as big as the total levies of the targeted realm) and are quite dangerous. They automatically receive a treasury of 500 gold.

腐化入侵

Muslim dynasties with at least 75% decadence that rule a duchy or higher may draw the ire of a desert tribe determined to end their corrupt rule. The invasion begins in a random realm province with a very large army appearing.

Upon success, the invader gets all occupied holdings and counties (like a tribal invasion). Top-level titles are destroyed and any other duke+ titles held by the defender are usurped. The invader also gets the nickname of "the Conqueror". The Crown Authority of all king+ titles is lowered to Autonomous Vassals.

什叶派哈里发的崛起

A special targeted invasion that may appear in any Sunni kingdom or empire with at least 10% decadence if no Shia caliph exists. A Shia child leader with the , and traits appears holding the duchy-tier titular title "Pretender Shia Caliphate"; the CB is "Shia Caliphate Rising in [kingdom]" e.g. "Shia Caliphate Rising in Egypt". Human-controlled Sunni realms are much less likely (MTTH 10x greater) to be targeted.

His invasion begins in a random province and invades its de jure kingdom (as long as he has at least 6 counties in it and the liege title isn't held by someone else). If he wins, he takes the kingdom title and becomes the Shia caliph, in addition to the usual "tribal invasion" type result of vassalising its de jure vassals and usurping any occupied holdings and counties. The truce lasts only 1 year, so the caliph may well attack his original target again very shortly.

获得宣战理由

This section is Christian-centric, and most of it could be merged into Expanding your realm.

While some of these CBs you'll have merely due to your position, like the independence CB and the law change CBs, many of these can be gained on purpose.

First, the easiest type of CB to gain are claims. There are four primary ways to gain claims:

1. Have your chancellor forge claims. This doesn't work for anything above the ducal level (skill of 15 needed to forge a ducal claim), unless you have the Become King of [Kingdom] ambition.
2. Marry someone who has an inheritable claim. Your children will have the claim and you can then push it.
3. Marry someone in your dynasty to someone who has an inheritable claim. Their children will have the claim, and you'll be able to push it.
4. Invite someone with a claim to your court. You'll then be able to push it.

Expanding your realm outside your de jure borders using claims can be tricky: unless they're of your dynasty, a landless claimant to such a title will become independent when you win their war. If you want them to be your vassal instead, you will want to land them first. Since you get a +100 "Pressed my Claim" opinion bonus, you might be able to offer vassalization afterwards, but only if they're the same religion and culture as you - otherwise the "False Religion" and/or "Foreigner" penalties, along with "Not my de jure liege", mean they're unlikely to accept.

Second, de jure claims are also relatively easy to gain. If you can create a duchy or kingdom that overlaps another realm's territory, this will gain you a de jure claim, and the same applies if you usurp it. (Unfortunately, both of these require having more than half of its de jure counties already, so you'll have to find some way to get hold of those.) In addition, after pushing a claim for a duchy, you'll often have de jure claims.

Third, excommunication CBs are easy to get as long as the religion head likes you, but these won't help you grow your realm. They're good for gaining some prestige, though.

Fourth, you can get religious war CBs on essentially the entire world if you convert to a heresy (a Catholic-derived heretic will have CBs on all rulers except Orthodox and Miaphysite ones or other Catholic-derived heretics, while a Muslim heretic will have CBs on absolutely everyone except other followers of the same heresy). As a Catholic, the easiest way to get heresy to appear so that you can convert is appointing an antipope, as this lowers the moral authority of the church. The lower the moral authority of the church, the more likely heresy is to spread. Then upon the first chance you get, you should change to whatever heresy arises. Another option is to have your court chaplain research cultural tech until a heretic find appears. So while the drawbacks of heresy are severe (-30 opinion with all non-heretics, and increased rebel risk), the advantages when it comes to expansion are huge. However, note that it's a two-way street - if you convert to a Catholic heresy then all Catholic rulers get a Holy War CB on you, and the Pope may even declare a Crusade against you.

Fifth, the pope will award strong, uninheritable claims to counties and duchies held by Catholic rulers, in exchange for some prestige and an opinion penalty. If the pope is your vassal (an emperor tier ruler who claims the papacy in the name of his antipope will receive the new pope as vassal), he will never refuse a request, regardless of opinion modifiers. This allows you to obtain one county or ducal claim per 100 piety (or 50 piety with papal investiture). You can use "Request Claim" to obtain any number of claims and then utilize "Claim all" CB. This strategy allows you to conquer vast amounts of land, even entire kingdoms with enough piety, in a single war, and allows you to appoint new count and duke level vassals on the newly conquered territory.

使用你的宣战理由

动自己的主张和类似的主张是相当直接的。然而，当你向别人提出要求时，你必须小心，否则他们最终会成为一个独立的领域。只有当他们已经是你的附庸，他们在你的王朝，或者你提出的要求是在法律上属于你所有权的一部分时，他们才会成为你的附庸。如果他们获得的头衔与你的或以上级别相同，即使上述任何条件适用，他们也将是独立的，除非你有一个军衔高于你，而这些条件仍然适用。 最简单的方法，以确保他们将成为你封臣后，推动他们的索赔是授予他们一个县或男爵在你的领域首先。那么，如果他们获得的头衔与你的或更高级别的头衔相同，那么他们就可以独立。应该指出的是，印度教人物不能被授予他们的种姓所不能拥有的地位。

战争无结果终止

Sometimes a war ends not with one side winning, or a white peace, but inconclusively. This happens when the war can no longer be pursued for some reason - usually because the casus belli is no longer valid. This does not, however, mean that a CB that could no longer be used leads to a war using it becoming invalid; the invalidation and usability conditions are separate, though usually related.

Some common messages are:

[War name] ended inconclusively (Casus Belli no longer valid)

This means that the war has become completely unjustifiable. For claim wars, this may mean the claimant died or the defender lost the wargoal for some other reason. For holy wars and crusades, it may mean the defender changed religion to one that can no longer be the target of such a war, usually by the special decision for converting to the attacker's religion. Force Vassalization can be invalidated if the target forms or acquires a title too high for the attacker to vassalize. Note that a successful claim war won't invalidate other claim wars on the same title - the war simply continues against the new holder.

[War name] ended inconclusively (Liege Change for [Defender])

You can only attack someone if either their direct liege is one of your lieges, or they are independent. When they become a vassal of someone who isn't your liege, the defender isn't a valid target any more, so rather than transferring the war to the new liege, the war simply ends. This frequently happens when attacking rebelling vassals when their rebellion ends. Again, note this doesn't invalidate other claim wars on the same title, which instead transfer to the new holder - even if he is a vassal.

[War name] ended inconclusively ([Defender] became unlanded)

This is pretty self-explanatory. The defender lost all his landed titles for some reason (perhaps in another war or due to his liege revoking all his titles), and is no longer a valid war target.

[War name] ended inconclusively ([Defender] joined [Attacker's Liege]'s war as attacker)

A vassal warred an independent realm allied to his liege, but the liege then called the independent ruler to war as an ally. This overrides the vassal's war.

[War Name] ended inconclusively (Realm Peace is enforced in the realm)

Conclave only. The combatants' liege's council enforced realm peace mid-war, forcing all in-progress wars inside the realm to abort.

[War name] ended inconclusively ([Character] has died)

The casus belli for the war was tied to a particular character, and they died, invalidating the war. This can happen with wars to revoke a vassal, or rivalry wars.

[War name] ended inconclusively

Without further explanation, this probably means the war was a faction or plot war and the leader died. With the leader gone, there is no one left to enforce demands, surrender, or sign a white peace, and so the war ends.

This may also happen in the event of a Tributary war or Free Captives war if the defender surrenders by decision.

战争命名

You can identify what Casus Belli was used to declare a war by its name. In addition to the examples below, there may be an ordinal prefix indicating that this is the Nth war of that name to have been declared (several may be ongoing at once, e.g. "Byzantine Holy War for Syria" and "2nd Byzantine Holy War for Syria" might be declared at the same time, both targeting the de jure Emirate of Syria, but the parts of it in two different realms).

For some wars, the result is that someone "gains or vassalises" one or more titles. This means that titles that can be vassalised are vassalised, and all the others are gained. Generally a title is gained if vassalising would end up also vassalising a title that wasn't being targeted. For example in the case of a holy war targeting a duchy in which one of the counts had land outside that de jure duchy, the attacker doesn't become their new liege, but just usurps the target titles.

Name template	Name example	Casus Belli used	Attacker	Defender	Goal (what happens on victory)
[Attacker adj](-[Defender adj]) War for ([Claimant]'s claim on) [Target]	English-Cornish War for David's claim on Devon	Claim (on nearly any title)	The claimant or his liege (e.g. Kingdom of England). If attacker and claimant are the same, the "claimant" part is omitted ("English-Cornish War for Devon" on behalf of the King of England).	The attackable realm (e.g. Duchy of Cornwall) that holds the target title (e.g. County of Devon). If defender and target are the same, the defender isn't mentioned ("English War for David's claim on Devon" attacking the Earl of Devon).	The claimant (e.g. David) gains the target title
[Attacker adj]-[Defender adj] De Jure War over [Target]	Welsh-English De Jure War over Devon	De Jure claim	The claimant (e.g. Duchy of Cornwall) or his liege (e.g. Kingdom of Wales), whose de jure but not de facto realm includes the target (e.g. Devon)	The attackable realm that holds the target (e.g. Kingdom of England)	The claimant gains or vassalises the target (e.g. County of Devon)
[Attacker adj](-[Defender adj]) Ducal War for ([Claimant]'s claim on) [Target]	Welsh-Somerset Ducal War for Duke David's claim on Devon	De Jure Claim (for a county on behalf of a vassal holding its duchy)	The claimant (e.g. Duke David of Cornwall) or his liege (e.g. Kingdom of Wales). If attacker and claimant are the same, the "claimant" part is omitted ("Cornish-Somerset Ducal War for Devon").	The attackable realm (e.g. Duchy of Somerset) that holds the target title (e.g. County of Devon). If defender and target are the same, the defender isn't mentioned ("Welsh Ducal War for Duke David's claim on Devon").	The claimant gains or vassalises the target.
[Attacker adj]-[Defender adj] De Jure Holding War over [Target]	Welsh-English De Jure Holding War over Axminster	[County] Holdings	The holder of the county (e.g. Devon) that contains the target minor holding (e.g. Axminster), or his liege (e.g. Kingdom of Wales)	The attackable realm (e.g. Kingdom of England) that holds the target	The holder of the county containing the target (e.g. Earl of Devon) gains or vassalises the target
War of [Attacker adj] Independence	War of Cornish Independence	Independence (non-faction)	A ruler who is not independent (e.g. County or Duchy of Cornwall)	The attacker's nominal liege (e.g. Kingdom of Wales)	The attacker becomes independent of his nominal liege (as a vassal of his nominal liege's liege, if any, e.g. Empire of Britannia)
[Leader adj] League Independence War	Cornish League Independence War	Independence (faction)	All members of the "Independence" faction within the leader's (e.g. the Earl or Duke of Cornwall's) nominal liege's realm (e.g. Kingdom of Wales), led by the leader (e.g. County or Duchy of Cornwall), having had their ultimatum refused	The attackers' nominal liege (e.g. Kingdom of Wales)	All attackers become independent of their nominal liege (as a vassal of their nominal liege's liege, if any, e.g. Empire of Britannia)
War against the Tyranny of [Defending ruler]	War against the Tyranny of King Hywel I of Wales	Overthrow Ruler	A vassal who escaped an arrest that was tyrannical or refused any revocation (tyrannical or justified)	The attacker's nominal liege (e.g. Kingdom of Wales)	Defender abdicates in favour of his/her heir
Revolt against the Rule of [Defending ruler]	Revolt against the Rule of King Hywel I of Wales	Overthrow Ruler	A vassal who escaped an arrest that was justified	The attacker's nominal liege (e.g. Kingdom of Wales)	Defender abdicates in favour of his/her heir
[Leader adj] War for [Claimant]'s claim on [Target]	Cornish War for Prince Hywel's claim on Wales	Claim on Liege faction	All members of the claim faction (e.g. "Prince Hywel for Wales") in their realm (e.g. Kingdom of Wales), led by the leader (e.g. County or Duchy of Cornwall), having had their ultimatum refused	The faction members' nominal liege (e.g. Kingdom of Wales)	Claimant (e.g. Prince Hywel) usurps the target title (e.g. Kingdom of Wales)
[Defender adj] Civil War for [Succession law]	Welsh Civil War for Seniority	Succession law faction	The leader and all members of the succession law faction (e.g. "Seniority Succession in Wales") in their realm (e.g. Kingdom of Wales), having had their ultimatum refused	The faction members' nominal liege (e.g. Kingdom of Wales)	Defender enacts specified succession type in the target realm (e.g. Seniority succession in Kingdom of Wales)
[Defender adj] Civil war to Lower Crown Authority	Welsh Civil War to Lower Crown Authority	Lower Crown Authority faction	All members of the "Lower Crown Authority" faction in their realm (e.g. Kingdom of Wales)	The faction members' nominal liege (e.g. Kingdom of Wales)	Defender enacts the next lower level of crown authority law in the target kingdom or empire (e.g. Kingdom of Wales)
[Attacker adj] Invasion of [Defender]	Cornish Invasion of Wales	Invasion (Christian)	A Christian, Jewish, or Zoroastrian ruler (e.g. County or Duchy/Petty Kingdom of Cornwall), whose relevant religious head (e.g. pope or ecumenical patriarch) has granted them permission to invade the target	A ruler of the same religion (e.g. both Catholic) as the attacker (e.g. Kingdom of Wales)	Attacker gains all occupied holdings and the target title (e.g. Kingdom of Wales)
[Attacker adj] Invasion of [Target]	Abbasid Invasion of Jerusalem	Invasion (Muslim)	A Muslim ruler (e.g. Abbasid Emirate / Sultanate / Empire)	Someone of a different religion who holds land in the target de jure kingdom (e.g. Jerusalem) bordering the attacker's realm, e.g. the Shia Caliph	Attacker gains all titles held by the defender within the target de jure kingdom (e.g. Jerusalem) and vassalises all the defender's subsidiary lords wholly within the target de jure kingdom. (Fate of lands in the target kingdom held by defender's subsidiaries who also hold land outside the target kingdom unknown.)
[Religion adj] Crusade/Jihad/Great Holy War for [Target]	Catholic Crusade for Jerusalem	Crusade	Head of the religion (e.g. the pope), joined by other rulers of that religion	A realm (e.g. the Sunni Caliphate) ruled by someone of a different religion holding land in the de jure target kingdom (e.g. Jerusalem)	The participant with the highest contribution, or the existing holder of the target kingdom if the same religion, gains the target kingdom and all titles held by the target in the de jure target kingdom
[Attacker] Holy War for [Target]	Welsh Holy War for Cornwall	Holy War	A ruler of any religion other than Jain, Taoist, or unreformed pagan (e.g. Catholic King of Wales)	A realm (e.g. Kingdom of England) ruled by someone of a different religion from the attacker (e.g. Germanic), holding land in the target de jure duchy (e.g. Cornwall)	The attacker vassalises all rulers of his religion who were vassals of the defender (except ones that have land outside the target, whose titles are usurped instead) and gains all other titles held by the defender within the target de jure duchy
[Attacker adj]-[Defender adj] Excommunication War	Gwyneddian-Cornish Excommunication War	Excommunicated ruler	A ruler of an religion which currently has a religious head and permits excommunication (e.g. County or Duchy of Gwynedd)	A realm whose ruler has the same religion and religious head as the attacker and is excommunicated (e.g. County/Duchy/Petty Kingdom of Cornwall)	The defender abdicates in favour of his heir
[Attacker adj] Conquest of [Target]	Abbasid Conquest of Damascus	Muslim county conquest	A realm ruled by a Muslim (e.g. Abbasid Emirate / Sultanate / Empire)	The realm controlling the target county (e.g. Damascus)	The attacker gains or vassalises the target county
[Attacker adj] Subjugation of [Target]	Abbasid Subjugation of Mesopotamia	Caliphal Subjugation	A Muslim Caliphate (or the caliph's liege?)	A realm ruled by someone of the same religion as the attacker holding land in the target de jure kingdom (e.g. Mesopotamia)	The attacker takes or vassalises all titles held by the defender in the target de jure kingdom
Imperial Reconquest of [Target]	Imperial Reconquest of Cornwall	Imperial Reconquest	(Restored) Roman Empire	A realm including land within the target de jure duchy (e.g. Cornwall)	The Roman Emperor gains or vassalises all titles held by the defender within the target de jure duchy
[Attacker adj]-[Defender adj] Trade War over [Target]	Veglian-Splitian Trade War over Zeta	Seize Trade Post	A patrician or merchant republic (e.g. Veglia)	Another patrician or merchant republic (e.g. Spalato (Split))	The attacker gains the target trade post (e.g. Zeta Trade Post)
[Attacker adj]-[Defender adj] War for the City of [Target]	Venetian-Apulian War for the City of Brindisi	Republic city conquest	A merchant republic (e.g. Serene Republic of Venice)	The liege (e.g. Duchy of Apulia) of the target city (e.g. Brindisi), in a county where the attacker controls a trade post	The holder of the trade post gains the target city
[Attacker adj]-[Defender adj] War for the Coast of [Target]	Venetian-Croatian War for the Coast of Senj	Republic county conquest	A patrician or merchant republic, on behalf of himself or his vassal, the mayor of a city (e.g. Brinje) in a county (e.g. Senj) that it doesn't control	The realm that controls the county containing the city (e.g. Duchy/Kingdom of Croatia)	The patrician who holds a city in the target county (e.g. Senj) gains the target county, and his city becomes its capital
[Attacker adj] Conquest of [Target]	Scottish Conquest of Northumberland	Pagan county conquest	A pagan realm (e.g. Kingdom of Scotland/Skotland)	The realm containing the target county (e.g. Northumberland)	The attacker gains or vassalises the target county
[Attacker adj] Invasion of [Target]	Magyar Invasion of Hungary	Tribal invasion	A Tengri, Aztec or non-Christian Altaic realm (e.g. Kingdom of Magyars)	A realm ruled by someone of a different religion containing land in the target de jure kingdom (e.g. Hungary)	The attacker gains all occupied territory and vassalises territory held by the defender in the target de jure kingdom
[Attacker adj] Subjugation of [Target]	Magyar Subjugation of Hungary	Pagan subjugation	A pagan realm (e.g. Kingdom of Magyars)	A realm of the same religion containing land in the target de jure kingdom (e.g. Hungary)	The attacker gains all occupied territory (whether in the target kingdom or not) and takes or vassalises all titles in the target de jure kingdom controlled by the defender
[County] Peasant Revolt	Devonian Peasant Revolt	Peasant revolt	[County] Peasant Revolt (a duchy-level titular title held by a peasant leader) (e.g. Devonian Peasant Revolt)	The current top liege of the Earl of Devon	Devon becomes independent, ruled by the peasant leader
[Realm] [Heresy] Uprising	Welsh Lollard Uprising	Heretic revolt	[Realm] [Heresy] Uprising (a duchy-level titular title held by a heresiarch, who appears with troops in a county of his religion) (e.g. Welsh Lollard Uprising)	The current top liege of the heresiarch's home county	Devon becomes independent, ruled by the heresiarch
[Leader]'s Conquest of [Target]	Sigurðr's Conquest of Cornwall	Adventurer conquest	[Leader]'s Host (a duchy-level titular title) (e.g. Sigurðr's Host)	A realm containing land within the target de jure duchy (e.g. Cornwall)	The attacker gains all the land held by the defender in the target de jure duchy (and the title itself, if it exists within that realm)
[Attacker adj] Invasion of [Target]	Umayyad Decadence Revolt Invasion of Hispania	Decadence invasion	[Leader] of [Attacker adj] Decadence Revolt (a duchy-level titular title) (e.g. Utman of Umayyad Decadence Revolt)	A realm with high decadence that triggered a decadence invasion	The attacker gains all occupied territory and vassalises territory held by the defender in the target de jure kingdom, but duke tier or above vassals gain an event giving them the possibility of revolt
Shia Caliphate Rising in [Target]	Shia Caliphate Rising in Egypt	Rise of the Shia Caliphate	Pretender Shi'a Caliphate (a duchy-level titular title held by a Quick Sayyid boy)	A Sunni realm	The attacker gains the target kingdom and becomes Shia Caliph

总结摘要

Casus belli and claims are easy to gain as long as you know what you're doing. Following these tips you should be able to expand easily.

• Most wars incur a truce which lasts either 10 years or until the death of one of the war leaders.
• Marry claimants with inheritable claims to gain more claims
• Marry your dynasty members to characters with inheritable claims (marry male claimants matrilineally if possible)
• Invite males with inheritable claims and grant them a county
• Invite pretenders and grant them a county
• Make the pope love you and you can farm prestige off of excommunication
• Go heretic and you'll have CBs on everyone
• Create or usurp duchies or kingdoms that overlap the territory of other realms

Additionally, different CBs have different values to you as a ruler. If you have more than one CB, consider pressing them in this order:

• Invasion/Crusade - you gain all land you occupy under the Kingdom title (requires a special decision with the new Crusades)
• Holy War - you gain all heretic/infidel held land in the targeted duchy
• Personal Claim - you can fill up your demesne or select the new holder of the county yourself, can push more than one on a given ruler at a time. Note that you don't get the title's vassals although they become your vassals.
• County Conquest - costs piety; can only be pressed one county at a time
• Seize County - you've already got one barony in this county, but this gives you the other 2/3rds of it.
• Dynastic Ducal/County Claim - install a member of your dynasty and add land to your realm.
• Vassal Ducal/County Claim - expands your realm, but the new holder isn't of your dynasty and you're making one of your current vassals more powerful
• Dynastic Kingdom Claim - unless you're an Emperor, this will install a dynastic ally into a Kingdom who can help you in future wars.
• Seize Coastal City - you're only getting one barony-level title out of this.
• Embargo/Excommunication - Great for bringing in money or prestige/piety, but won't expand your realm.

另见

• Casus Belli modding

战争