On 6–7 April, 10 DC-3s of Pan American Airways begin hauling 30,000 gallons of fuel and 500 gallons of lubricants from Dum Dum Airport, Calcutta to Asansol for operations. This fuel, subsequently transferred via Dinjan Airfield, India to China, was for use by Lieutenant Colonel James H Doolittle's raiders when they landed in Zhuzhou, about 100 miles southwest of Shanghai, China after their attack on Japan. Doolittle Raiders never made Zhuzhou due to fuel shortages, aircraft subsequently lost.
In 1943, airfield turned over to USAAF. Initially used by 5318th Provisional Air Unit, beginning late 1943 operating P-51 Mustangs, B-25 Mitchell medium bombers and C-47 transports with Waco CG-4A gliders used for attacks in Burma. The unit tested the United States' first use of a helicopter in combat, six Sikorsky R-4s in May 1944. 1st Air Commando Group activated in May 1944. Used by 164th, 165th, 166th Liaison Squadrons, equipped with UC-64, L-5 observation aircraft, September–December 1944. Later used by 5th and 6th Fighter Squadrons, December 1944-June 1945 flying P-47 Thunderbolts.
Also used by 319th Troop Carrier Squadron, flying C-47s, September–December 1944. 1st ACG returned to United States, 6 October 1945.
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