Marines with 3rd Battalion, 1st Marine Regiment line up to board an aircraft during a training exercise, aboard Marine Corps Base Camp Pendleton, Calif., July 28. Marine Heavy Helicopter Squadron (HMH) 462 and the Royal Canadian Air Force supported 3rd Battalion, 1st Marine Regiment during Rim of the Pacific (RIMPAC) 2016. - Marines with 3rd Battalion, 1st Marine Regiment line up to board an aircraft during a training exercise, aboard Marine Corps Base Camp Pendleton, Calif., July 28. Marine Heavy Helicopter Squadron (HMH) 462 and the Royal Canadian Air Force supported 3rd Battalion, 1st Marine Regiment during Rim of the Pacific (RIMPAC) 2016.