Bulgarian Special Forces and U.S. Army Green Berets assigned to the 20th Special Forces Group (Airborne) engage opposing forces during a combined air assault operation June 18, 2019, as part of Exercise Trojan Footprint 19 near Yambol, Bulgaria. Trojan Footprint is an annual U.S. Special Operations Command Europe-led exercise that incorporates Allied and partner special operations forces, this year's exercise brought together 1400 SOF from ten nations for training over land, sea and air across Bulgaria, Hungary, Romania and the Black Sea. (U.S. Army photo by Sgt. 1st Class Whitney Hughes, U.S. Special Operations Command Europe Public Affairs)