The I Tactical Air Division is an inactive United States Air Force unit. It was last assigned to Second Air Force, based at Biggs Field, Texas. It was inactivated on 22 December 1945.
The air division was activated at Fresno Army Air Base, California as the 4th Ground Air Support Command in September 1941, drawing its cadre from the 15th Bombardment Wing, which was simultaneously inactivated. It was one of five such commands activated that month.
Following the Japanese attack on Pearl Harbor, the command's observation units performed antisubmarine patrols off the Pacific coast. These patrols continued until January 1943.
At various times, supervised heavy bomber flights to Hawaii, gave air support to ground units in training, participated in air-ground maneuvers, and put on air support demonstrations.
Constituted as 4 Air Support Command on 21 August 1941
Activated on 3 September 1941
Redesignated
4 Ground Air Support Command 30 April 1942
Redesignated
IV Air Support Command 12 September 1942
Redesignated
III Tactical Air Division 4 September 1943
Redesignated
I Tactical Air Division in April 1944
Inactivated on 22 December 1945
Disbanded on 8 October 1948
Fourth Air Force, 3 September 1941
Second Air Force, 12 August 1942
Desert Training Center, 21 January 1943
Second Air Force, 1 December 1943
Third Air Force, April 1944
Second Air Force, 23 November – 22 December 1945
Fresno Army Air Base, California, 3 September 1941
Hamilton Field, California, 11 September 1941
Presidio of San Francisco, California, 7 February 1942
Thermal Army Airfield, California, 20 January 1943
Camp Young, California, c. September 1943
Thermal Army Air Field, California, c. 15 December 1943
Esler Field, Louisiana, c. 13 April 1944
Alexandria Army Air Base, Louisiana, September 1945
Barksdale Field, Louisiana, c. 16 November 1945
Biggs Field, Texas, c. 23 November – 22 December 1945
12th Bombardment Group, 3 September 1941 – 21 January 1942
47th Bombardment Group, 3 September 1941 – 15 February 1942
69th Observation Group, 3 September 1941 – 21 August 1942
70th Observation Group, 13 September 1941 – November 1942
71st Observation Group, March 1942 – August 1942
85th Bombardment Group, November 1942 – January 1943
10th Air Support Communications Squadron, 7 September 1941 – unknown
31st Observation Squadron, 3 September 1941 – 29 March 1943 (attached to 69th Observation Group after December 1941)
835th Engineer Aviation Battalion, c. 16 April 1942 – c. January 1943
319th Signal Company, Air Wing, 3 September 1941 – unknown
Tow Target Detachment, March Field (later 7th Tow Target Squadron), 3 September 1941 – November 1943
Tow Target Detachment, McChord Field (later 8th Tow Target Squadron), 3 September 1941 – July 1942
