I'm currently playing as the Aztecs and my playing style is generally peaceful. However, annoying civilizations have felt the wrath of anything ranging from my jaguar warriors 'til tanks.
I was all set to win a space race victory (Apollo almost finished), when I moved one of my destroyers along the English shore. I move my units by mouse, and along the route there appeared to be an English sub. The computer didn't warn me there was a sub, but automatically attacked the sub. I did have a ROP-agreement with the English. This resulted in all countries cancelling ROP-agreements with me, and within a few turns having other countries including my faithful allies the Romans to declare war on me. Hell, I never wanted to attack the English...yet.
Anybody had a similar experience?