Charles Lindbergh persuaded United Aircraft to designate him a technical representative in the Pacific Theater of Operations to study aircraft performances under combat conditions. He showed Marine Vought F4U Corsair pilots how to take off with twice the bomb load that the fighter-bomber was rated for and on May 21, 1944, he flew his first combat mission: a strafing run with VMF-222 near the Japanese garrison of Rabaul, in New Guinea. He was also flying with VMF-216 during this period from the Marine Air Base at Torokina, Bougainville Australian Solomon Islands.
In his six months in the Pacific in 1944, Charles 'Slim' Lindbergh took part in fighter bomber raids on Japanese positions, flying about 50 combat missions as a civilian. (Wikipedia)