Established in mid-1942 as the 440th Bombardment Squadron; equipped with B-26 Marauder medium bombers.
  Trained in the Southeastern United States under III Bomber Command.
 Was deployed to North Africa in late 1942 as part of Twelfth Air Force, operated from desert airfields in Morocco, Algeria and Tunisia.
  The squadron attacked enemy railroads, airfields, harbor installations, and shipping along the Mediterranean Coast.
  Moved to Sicily and Italy and participated in the Italian Campaign, attacking targets in Italy supporting the Fifth Army advanced in the Cassino and Anzio areas.
 The squadron later attacked targets in the Rome area, then moved to Corsica to support the Allied landings in Southern France.
 Remaining in Corsica, the squadron later hit railroad bridges in Northern Italy and late in the year attacked railroad lines through the Brenner Pass that connected Germany and Austria with Italy.

In January 1945, the squadron returned to the United States, where it began to train with A-26 Invader aircraft for operations in the Pacific Theater.
Between May and July 1945, moved by ship to Okinawa, and on 16 July flew its first mission against Japan.
From then until the end of the fighting in early August, the squadron attacked enemy targets such as airfields and industrial centers on Kyūshū and occupied Shanghai area of China, and shipping around the Ryukyu Islands and in the East China Sea.
 In November and December 1945, the squadron returned to the United States and was inactivated.
Established in mid-1942 as the 440th Bombardment Squadron; equipped with B-26 Marauder medium bombers.   Trained in the Southeastern United States under III Bomber Command.  Was deployed to North Africa in late 1942 as part of Twelfth Air Force, operated from desert airfields in Morocco, Algeria and Tunisia.   The squadron attacked enemy railroads, airfields, harbor installations, and shipping along the Mediterranean Coast.   Moved to Sicily and Italy and participated in the Italian Campaign, attacking targets in Italy supporting the Fifth Army advanced in the Cassino and Anzio areas.  The squadron later attacked targets in the Rome area, then moved to Corsica to support the Allied landings in Southern France.  Remaining in Corsica, the squadron later hit railroad bridges in Northern Italy and late in the year attacked railroad lines through the Brenner Pass that connected Germany and Austria with Italy.
In January 1945, the squadron returned to the United States, where it began to train with A-26 Invader aircraft for operations in the Pacific Theater. Between May and July 1945, moved by ship to Okinawa, and on 16 July flew its first mission against Japan. From then until the end of the fighting in early August, the squadron attacked enemy targets such as airfields and industrial centers on Kyūshū and occupied Shanghai area of China, and shipping around the Ryukyu Islands and in the East China Sea.  In November and December 1945, the squadron returned to the United States and was inactivated.
117th Air Refueling Squadron