Check this out. I was fooling around with Georgia Anyway the OE was at war with Trebizond, and I didnt really want them annexed. Joining the war would probably get me squished in short order. So I managed to get military access from my neighbor, and I just marched my army in. Now since I had access, and the OE was at war, I was given priority for the supplies in the province. So the OE has having horrible attrition, and eventually gave up. I didn't have to fight a single battle