So basically if I want to marry my kids into other families, the main reason to do so is not to gain new territories, but to have helpful allies? For the most part?
I am going to load an older game, before people started dying, and try to change the primary title. Thanks! If I can't get these 2 kingdoms merged, maybe I can at least have my son inherit some Hungarian provinces that can be added to his kingdom of Poland.
You know, each time I load up this game, I think to myself: "I should try playing as someone who isn't Polish".. but then I've never really had a satisfactory game with my people. So the cycle repeats.. I guess with EUIV I broke out of the cycle by having that one successful game, so if I play CKII enough, it should happen as well..
Orrrr, you can marry your sons with other king's daughters (and matrimarry your daughters to men who are high in the line of succession but not enough to reject matrimarriage) so that you get a new courtier who you can either press the claims of, or murder the older relatives of so they inherit and your dynasty begins ruling the other country once their child inherits the throne.