Made it to turn 105 and came to a border, was threatened once, I backed off. Accidentally came to their border again and they flipped out on me, I kept saying 'I will back off peacefully' but then it'd pop up again. I kept selecting the peaceful response about 20 times until the game crashed. I think I had some AI NPCs on Autoexplore and they may have been walking around the enemy territory which caused this bug/glitch to occur.
