He enlisted in the USAAF at Wausau, Wisconsin, on 24 January 1941. Sgt. Baumgartner was stationed at Jefferson Barracks, Mo. for 18 months before going to Las Vegas, Nev. where he received his wings on Dec. 15, 1942. After further training at Laurie Field, Denver, Colo., Tucson, Ariz., and Blythe, Calif., he underwent operational training at Salinas, Calif. From Salinas, he flew to Lincoln, Neb., from where he was granted a furlough in August. He was sent overseas in September, flying directly to Europe from Lincoln, Neb. with a bomber crew. On 23 January 1944, B-24J, # 42-73067 (“Rangoon Rosie”), departed Madhaigunj, India, on a bombing mission to Mergui, Malayan Peninsula. It was assigned to the 10th Air Force, 7th Bomb Group, 436th Bomb Squadron. It was seen to crash at about 1610 hours at 12º30’ North - 95º 30’ East, in Malaya, shot down by enemy aircraft. It was noted to be a battle casualty. Its crew were killed in action, except TSgt Grant L. Butcher, who was wounded and captured by the Japanese. A Graves Registration team recovered remains from where crew was buried. Unable to distinguish the remains, they were buried in a single casket group burial in Arlington National Cemetery 25 July 1949, Section 34, grave 5023. He was awarded the Air Medal and Purple Heart.