Does Greece occupied the Balkan peninsula?

Yes, Greece did occupy the Balkan peninsula during the Balkan Wars of 1912-1913. The Balkan Wars were a series of conflicts that involved several nations in southeastern Europe, including Greece. As a result of these wars, Greece gained significant territories in the Balkan Peninsula, including Macedonia, Epirus, and Thrace. These territories were incorporated into the Greek state, and Greece emerged as one of the major powers in the region.