As pointed out by Tom Au in this answer to "Has there ever been a truly multi-sided war?", Turkey fought and lost to Bulgaria, Serbia, Greece and Montenegro in the First Balkan War. However, shortly after this, Bulgaria fought its former allies (the Second Balkan War). Romania and Turkey also joined this war against Bulgaria. I wonder how was the relation between Turkey and those Balkan countries which were its former enemies?
Probably they didn't really run into each other because of the geography, but did they communicate to each other? Was there some hostilities between them, or cooperation?