So, I decided to do a play as England with Art of War. Haven't played England in ages, but decided I wanted to steamroll a game to test the new features. Alas, the play through has led me to facing a problem I've never dealt with before. I was doing quite well. Won the initial war against France, achieved my PU. Diplomatically vassalized Brittany and managed to force vassalize three of the Irish nations. The last was Connacht who I held an alliance with for roughly 40-50 years. Any who, I managed to conquer Scotland and was able to form Great Britain in 1589. The moment I formed Great Britain, Connacht broke their alliance with me. Reason being? Distance between borders. I can still ally and have royal marriages with all the European nations, but this tiny Irish nation right next to one of my core provinces and three of my vassals can no longer do diplomacy with me due to distance. Anyone have an idea of why this might be?