Okay, I'm very new at this but I saw it and I was curious. I was playing as Venice and had fought a rather large war against Turkey with my alliance. I got Bosnia and Austria got Serbia I think. But my army managed to lay seige to a large portion of Turkish Europe thanks to the fact that the Turkish army had been massacered fighting the Mameluks. Now that the war is over (and has been for a while) I look at the Political map and see my shield in Greece, which is still in Turkish control. Any idea what that means?