The group served in the European Theater of Operations, earning a Distinguished Unit Citation for its actions interdicting German reinforcements during the Battle of the Bulge.

It was called to active duty for the Korean War, but was inactivated after its personnel were used to bring other units up to full strength.

It remained inactive until 1991, when it became the 323d Operations Group at Mather Air Force Base, California, where it trained navigators until it was inactivated in 1993.

The group was assigned to the Eighth Air Force's 3d Bombardment Wing, part of VIII Bomber Command.

The group flew missions against V-1 flying bomb and V-2 rocket sites along the coast of France and attacked airfields at Leeuwarden and Venlo in conjunction with the Allied campaign against the Luftwaffe and aircraft industry during Big Week, from 20 to 25 February 1944.

The group participated in the aerial attacks supporting Operation Cobra the breakout at Saint Lo and began flying night missions against fuel and ammunition dumps.

During the Battle of the Bulge, the 323d hit transportation targets to prevent enemy reinforcements from reaching the Ardennes, earning a Distinguished Unit Citation for its efforts.

Its personnel were used as fillers for other units, with Strategic Air Command receiving first choice, and the group was inactivated a week later.

[4] This article incorporates public domain material from the Air Force Historical Research Agency Volume IV, European-African-Middle Eastern Theater of Operations