Before 1.8 it was entirely possible to keep Sweden in the Kalmar Union, after 1.8 it was still possible to keep Sweden in the Kalmar Union - But it was pretty hard. I managed to keep Sweden in the Kalmar Union by allying with France, joining the Hundred Years War, and then giving Sweden gifts - Giving them the +25 relations with me. Now however, that's not possible anymore. Sweden breaks the Kalmar Union far too early, and far too often. Furthermore, you have to have 200 relations, or else they will be hostile, and they will break free. Seriously, I tried having 199 relations with Sweden, yet they still broke free. But you will almost never make it to 199, because Sweden will now break free before it is possible for you to ally France.
So I really can't see a way to keep Sweden in the union anymore - Why does it have to be so hard to keep them in the Kalmar Union?
So I really can't see a way to keep Sweden in the union anymore - Why does it have to be so hard to keep them in the Kalmar Union?