游牧民骚动（英文：Nomad agitation）机制使得非游牧制国家难以征服 游牧制国家的无城堡或城市领土。
A nomadic ruler who reclaims the county can remove the modifier using the Reclaim Nomadic County title action, which also usurps the county.
最简单的解决方案是直接建造一座城堡或城市。花费大概500财富，but you may be able to convince a wealthy feudal vassal to pay the cost instead of you.
A more economical approach is to build Hillfort IV in the tribe. This costs only 375 wealth and usually creates a full set of (castle + city + temple) replacing the tribe upon Upgrade tribe or Adopt feudalism. However, it takes 4 years to build Hillfort IV from scratch, and the investment can be lost due to unexpected death.
Even more economical is to build a Hillfort IV in single tribe, and give it to a tribal vassal to use as their capital county. When they adopt feudalism, their entire demesne will be converted from tribes to castles. Try to pick the duchy capital, since dukes tend to move there if they can. Alternatively, pick a county that already has hillfort progress, but ensure the vassal cannot create the duchy title. A vassal with high stewardship is ideal, because they can hold many counties without feeling they need to give one away.
Tribal vassals with Hillfort IV in their capital will usually adopt feudalism within about a year, assuming they share their direct liege's culture group and exact religion.
If playing as a nomad, be on the lookout for nomad agitation in neighbouring realms; the AI rarely manages to keep nomadic counties during succession, offering a chance to grab additional land. As a Khagan, you may even have a new vassal clan joining you, although this may not be a good thing.
Completely destroying all holdings in a county ensures that the "nomad agitation" modifier will be present.