

When this happens, the vassal system is usually retained, but incorporated into the new warlord's domain, creating a tree structure - one king might have split his kingdom up into several duchies, each administered by a duke appointed by the king, and each duchy might be split into several baronies, each administered by a baron appointed by the duke. The most powerful warlords can even take over large regions that themselves have vassal systems. If the warlord is perceived as weak, one of the vassals will often take that opportunity to try and impose their will on the system, potentially even becoming the region's dominant power whom other vassals obey, replacing the previous warlord.

The vassals remain obedient under the warlord because they believe that the warlord is powerful enough to replace them should they disobey. In times where the warlord is brought into conflict directly, the warlord can also levy the vassals' armies, adding their soldiers to his own military power. They are individually responsible for defending, taxing and controlling their region, then send a portion of what they tax up to the warlord. These generals then effectively become the warlord's vassals. The warlord might split his domain up into 5 smaller regions for example, and give one region to each of his four favourite generals. Administrating large regions is difficult, so the warlord will typically delegate tasks by appointing trusted generals to areas of land. Some warlords grow powerful enough that they can completely defeat a neighbouring warlord. Conflicts arise most commonly in these marches, as disagreements between the warlords over who should get to own which bits heat up. Often you get regions where two or more warlords all project power. Invasions are rarely formal, the warlord just starts to send soldiers to collect taxes from more villages, and if no other local warlord wants to compete for the village (or does send soldiers but loses), then that village effectively becomes the property of that warlord. What borders mean here is the furthest that a warlord can project his power. Over time, those warlords accumulate wealth and power, and they start looking to invade other territories to expand their wealth and power further. In practice, this deal tends to be quite one-sided because when a guy with a sword and a horse rolls into town and threatens to stab anyone who doesn't do what he says, there isn't a great deal the peasants can do about it. The idea here is that the warlord protects the peasants from outside threats, and in return, the peasants give the warlord some of their grain n' shit. Some warlords establish themselves in small regions.
FEUDAL KINGDOMS WORLDBUILDING REDDIT CRACK
You're probably going to want to crack open a history textbook to get the details, but the general gist of a kingdom is this:
