I was just wondering if there is a limit to how many sides can appear in a single battle, of if the only limit is how many can reach the same province in a single year. I have never seen more than four in a single battle. How many have you seen and in what circumstances?

In my case, I was playing the Italians (vanilla, no VI) and invaded Serbia ( think) by sea. My Byantine and Hungarian allies obligingly showed up and stormed the slope that the rebels were defending. By the time my almost entirely infantry army reached the rebels, it was all over. Since I took no casulaties, I had the most survivors and got the province without even drawing my sword or loosing an arrow. I regretted it later though. I had to garrison the province well so my Byzantine and Hungarian friends wouldn't decide to turn against me to take an easy province, and I did not dare develop it much in case one of my pals did take it away from me. Could have made better use of those troops!