Its last assignment was with the 305th Bombardment Wing at Bunker Hill Air Force Base, Indiana, where it was inactivated on 15 February 1961.

Following V-E Day, the squadron moved to Germany, where it formed part of the occupation forces until inactivating in December 1946.

The air echelon received additional training at Hancock Field, New York, before taking the North Atlantic ferrying route to Prestwick in September and October.

The squadron flew eight night bombing missions before the end of October, by which time the entire air echelon had arrived.

On 4 April 1943, it made a precision strike on the Renault automotive factory in Paris in the face of devastating fighter attacks by an estimated 50 to 75 Focke-Wulf Fw 190s, which attacked the squadron's formation for fifty minutes,[6] and heavy flak,[c] for which it was awarded the Distinguished Unit Citation (DUC).

[4] In late summer of 1943, the squadron began flying night bombing missions together with bombers of the Royal Air Force on a trial basis.

In July 1944 it attacked enemy positions in advance of ground forces in Operation Cobra, the breakout at Saint Lo.

[4] Following V-E Day, the squadron moved to Sint-Truiden Airfield in Belgium, from which it conducted photographic mapping flights over Europe and North Africa which came under the name Project Casey Jones.

[10] The three squadrons of the 4400th Combat Crew Training Group performing this mission were Air National Guard units that had been called up for the war.

[11] However, the 422d did not remain with the crew training school, but was assigned to the 4430th Air Base Wing, the host organization for Langley.

This article incorporates public domain material from the Air Force Historical Research Agency