A U.S. Soldier of 1st Battalion, 4th Infantry Regiment acting as a Opposing Forces (OPFOR), reacts to contact during an assault in an urban environment at the 7th Army Joint Multinational Training Command's Distinguished Visitors Day for Exercise Allied Spirit IV at Hohenfels Training Area, Germany, Jan. 27, 2016. The Allied Spirit IV Exercise focuses on unified land operations and enhancing fires interoperability and integration of NATO Allies. (U.S. Army photo by Spc. Nathanael Mercado/ Released)