U.S. Marines attached to Infantry Training Battalion,

U.S. Marines attached to Infantry Training Battalion, School of Infantry - East, prepare to throw M69 training grenades during a training exercise for the Infantry Small Unit Leaders Course (ISULC), Camp Lejeune N.C., Sept. 22, 2016. The purpose of ISULC is to develop an infantry sergeant that trains and leads their unit in a complex operating environment to achieve their commander’s intent. (U.S. Marine Corps photo by Sgt. Rebecca L. Floto, 2d MARDIV Combat Camera)