. . . . . . "1st Proving Ground Group"@en . . "1939"^^ . . . . . "1"^^ . "The 1st Proving Ground Group is a disbanded United States Army Air Forces unit. It was last active with the Army Air Forces Proving Ground Command, based at Eglin Field, Florida. It was disbanded on 1 April 1944. The unit's personnel/equipment/mission was taken over by the 610th Army Air Forces Base Unit (AAF Base Unit) and 611th AAF Base Unit."@en . "The 1st Proving Ground Group is a disbanded United States Army Air Forces unit. It was last active with the Army Air Forces Proving Ground Command, based at Eglin Field, Florida. It was disbanded on 1 April 1944. The unit's personnel/equipment/mission was taken over by the 610th Army Air Forces Base Unit (AAF Base Unit) and 611th AAF Base Unit."@en . "1"^^ . . . . "Test and Development"@en . .