To build your own empire, the hardest thing to do is get a deal available to you. To do this, join one of the factions and deserve to be elected as the head of the colony.
5. After joining a faction, it’s time to make it crumble from within: 5.1. Keep buying all their settlements and repeat 3. It might be easier to check the kingdom’s clans and who all the landowners are, then use them to form an army. If they are already in an army, you can force disband them in the kingdom’s army menu.
Pick a faction that you don't like. Preferably one with a castle at the far edge of the map. Execute one of their lords to start a war. Begin castle siege to bait other lords into showing up to help defend it.NHqh.