Spc. Marcus Holstine, an assistant combatives instructor assigned to Regimental Headquarters and Headquarters Troop, 2d Cavalry Regiment corrects his students as they go through the steps of a rear naked choke hold during the Regiment's first certified combatives class at the Memorial Gym located on Rose Barracks, Germany, Mar. 18, 2015. (U.S. Army photo by Sgt. William A. Tanner/released)