Base operations began to increase in June 1946 with the organization of a full-scale Ground Training Program and the arrival of the Special Ordnance Squadron and Special Transport Flight of the 58th Bombardment Wing. Aircraft being maintained by the 58th Bombardment Wing included five B-29 Superfortresses and C-45 Expeditors, two C-47s, B-25 Mitchells and L-5s, and a C-46 Commando, AT-11 Kansan, F-80 Shooting Star, F-61 Black Widow, and F-59 Airacomet. Prior to the new Ground Training Program, which began officially on 24 June 1946, some training was carried out by individual units, primarily physical engineering, bombardiering, and armament. With the new program came a push for development of a comprehensive organization, with training in navigation, bombing, personnel equipment, chemical warfare, physical training, synthetic training, and use of the gunnery range.