U.S. Army Soldiers from 2nd Battalion, 11th Field Artillery Regiment, 2nd Brigade, 25th Infantry Division, prep a M777 howitzer for defense during a battle period exercise for Decisive Action Rotation 14-07 at the National Training Center here, May 24, 2014. Decisive Action rotations are geared toward an adaptive enemy in a complex environment. (U.S. Army photo by Spc. Jacolby Young/Released)