I am playing Japan. I conquered America's capital, Washington, and then, since I had few military units left, accepted Washington's offer for a 10-turn peace treaty. However, now I cannot break it! In the Deal History tab in the Diplomacy Overview menu, the last deal I had with Washington was Peace Treaty (10 turns) on turn 190. It is now turn 225 and I can't declare war in the diplomacy menu because it says I need to wait for the treaty to expire. Has anyone else experienced this bug??