Whoa, the treacherous Vanheim attacked me first
I had to counter invade as a matter of honor.
But you seem to take back your provinces on the next turn, anyway. Raidng groups of a paltry 3 White Centaurs are no match for 40 Skin Shifters and Cow (or Herd?) men.
This is a fun game. It's moving fast, which is great. Now I just have to do something about my abysmal research. Fighting with sticks doesn't cut it.