During Operation Overlord, two serials of aircraft, one of 45 and the other of 36 from the 439th TCG were dispatched late in the evening of 5 June to drop the 506th Parachute Infantry Regiment during the first hour of the invasion behind Utah Beach.

After the Normandy invasion the group ferried supplies in the United Kingdom until the air echelon was sent to Italy in July to transport cargo to Rome and evacuate wounded personnel.

The detachment dropped paratroops of the 517th Parachute Infantry Regiment along the Riviera in support of the invasion of Southern France on 15 August, and later towed gliders to provide reinforcements; for these missions the group earned another citation from the French government.

When the Allies made the air assault across the Rhine River in March 1945, each aircraft of the 439th towed two gliders with troops of the 17th Airborne Division and released them near Wesel.

The group also hauled food, clothing, medicine, gasoline, ordnance equipment, and other supplies to the front lines and evacuated patients to rear zone hospitals.

[2] From June 1949, the group trained in troop carrier operations until mobilized in April 1951, its personnel being used as fillers for USAF organizations worldwide during the Korean War.