Having the ability to found our own kingdom should come with the ability to create our own troop tree and culture or use one of the other factions culture. Customizing each tier should cost money per equipment. Once you submit your final result, that class will be part of your troop tree. Having your own culture should allow you to pick 2 or more perks that will identify your faction. As a factionless clan, you gather enough troops made up of bandits, peasants, mercs, random culture units, and work your way up to establish your own kingdom, culture, and own unique military.