U.S. and Polish soldiers observe artillery rounds hitting an impact area during Dynamic Front 18 at the 7th Army Training Command's Grafenwoehr Training Area, Germany, March 8, 2018. The U.S. soldiers are assigned to the 2nd Cavalry Regiment. Dynamic Front is an annual U.S. Army Europe exercise focused on the interoperability of Army, joint service and allied nation artillery and fire support in a multinational environment. Army photo by Markus Rauchenberger