Last night I finished my first campaign! Long campaign Mori N/N.
Nearing the end I was mostly rushing provinces to actually get to 40, because at some places I was facing large enemy armies with no chances of achieving peace with anyone anymore.
I was setting up quite many vassals, which seemed a logical step after about 20 provinces owned. But much to my dismay I noticed that my longest time vassal (since turn 20 or so) which had a full stack of units many of which katana samurai attacked my other vassals in adjacent provinces (acquired within 10 turns of 1st vassals betrayal), so I had to scrape up an army and beat them.
None of my vassals previously had indicated any interest to betray me so I want to know what kind of experiences do other people have with vassals. Have they ever betrayed you? And I was surprised that they were able to declare war on each other, since I was under the impression vassal could only declare war on his master. So can they declare war on other people, or just other vassals under same master?