Marine Corps Cpl. Kade Ritsema scans the terrain during a mock patrol as part of a Sapper Leaders Course at Camp Pendleton, Calif., Nov. 2, 2017. Ritsema is assigned to 1st Combat Engineer Battalion, 1st Marine Division. The Sapper Leaders Course consists of five phases which test communication, land navigation, patrolling, reconnaissance, landmine warfare and demolition. Marine Corps photo by Pfc. Dalton S. Swanbeck