 The U.S. Marines with the 1st Battalion, 4th Marine Regiment, 1st Marine Division, participate in a tactical recovery of aircraft and personnel course, hosted by Expeditionary Operations Training Group. I'm Marine Expeditionary Force at Marine Corps Base Camp Pendleton, California. The TRAP course is designed to develop the capabilities of Marines to recover aircraft, personnel, and equipment in austere environments. Yoke is a section of the IMF command element that trains and evaluates deploying Marine Expeditionary Units and other designated forces in select individual and collective tasks to prepare them to support geographic combatant commands.