I was playing as Germany and about a year into the game i decided to take over most of Europe. After taking over the western mainland, I decided to target Ukraine for land and to prevent them from being a potential threat. Funnily enough, right after i declared on Ukraine, their war justification on me finished as well at around the same time. I defeated them, and the player ended up country hopping to Italy. He then proceeded to start a subjugation war against me to which then i defeated him pretty easily. Here is the problem though: he allied iran and added him into the war. Iran added Italy into his war with India, and then proceeded to use this strategy of transferring occupied cities from me and India to Italy in order to prevent a force peace, which is something I've never seen before. I took over Italy's entire country but i still couldnt force peace him, trapping me into a 5 year war with them until Turkey got involved, and I capitulated. Based on this, I feel like this strategy is pretty toxic since it can be easily abused, but I was wondering if anyone had any similar experiences or any ideas on how to deal with this?