In August 1942, enlisted in Marine Corp. As a First Lieutenant. Power arrived at Marine Corps Air Station Cherry Point, North Carolina in July, 1944 and was assigned to VMR-352 as an R5C transport copilot. The squadron moved to Marine Corps Air Station El Toro in California in October 1944. Power was reassigned to VMR-353 and joined them on Kwajalein in February 1945. He flew cargo in to and wounded Marines out during the Battle of Iwo Jima and the Battle of Okinawa.