What are the advantages of creating a duchy and giving that title out? i understand i can only have two before my vassals start getting upset so as i progress i get the option to usurp/create a duchy and then i give them to a nice guy. 10 years down the road mr. nice guy is leading a war of independence against me. should i not create them? what are the advantages of having 3 or 4 dukes in your kingdom compared to having all one-county vassals?