German soldiers with 4th Battery, 131st Artillery Battalion carry out a fire mission with self propelled howitzers as part of exercise Dynamic Front 18 at the 7th Army Training Command's Grafenwoehr training area, Germany, March 07, 2018. Exercise Dynamic Front 18 includes approximately 3,700 participants from 26 nations at the U.S. Army’s Grafenwoehr Training Area (Germany), Feb. 23-March 10, 2018. Dynamic Front is an annual U.S. Army Europe (USAREUR) exercise focused on the interoperability of U.S. Army, joint service and allied nation artillery and fire support in a multinational environment, from theater-level headquarters identifying targets to gun crews pulling lanyards in the field..