Spc. Marcus Holstine, an assistant combatives instructor assigned to Regimental Headquarters and Headquarters Troop, 2d Cavalry Regiment helps his students as they walk through the steps of a cross collar choke 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)