4th Air Force (4th AF)
U.S. Army Air Force (USAAF)

Background
The 4th Air Force (4th AF) was part of the U.S. Army Air Force (USAAF).

Wartime History
On December 11, 1941 the 2nd Air Force (2nd AF) and 4th Air Force (4th AF) were assigned to the US Army Western Defense Command and fly anti-submarine patrols off the west coast of the United States.

Bombardment Group (BG)
30th Bombardment Group (30th BG)
34th Bombardment Group (34th BG)
41st Bombardment Group (41st BG)

Fighter Group (FG)
14th Fighter Group (14th FG)
78th Fighter Group (78th FG)

Observation Group (OG) / Reconassiance Group (RG)
71st Observation Group (71st OG)

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