Shortly after joining the Army, Wallace was sent to the Philippines to help protect America’s interests during the Philippines' struggle for independence (Philippine-American War). It was during this deployment that then, second Lieutenant Wallace was awarded the Medal of Honor for gallantry in action during a skirmish with local rebels near Tinuba, Luzon on March 4, 1900.
George Wallace was awarded the Medal of Honor on June 25, 1900. The citation states: With another officer and a native Filipino, was shot at from an ambush, the other officer falling severely wounded. 2d Lt. Wallace fired in the direction of the enemy, put them to rout, removed the wounded officer from the path, returned to the town, a mile distant, and summoned assistance from his command.
George Wallace died on May 22, 1946 at 73, and is buried at the San Francisco Nation Cemetery.