From Wikipedia:
Coogan enlisted in the US Army March 1941. After the attack on Pearl Harbor, he requested a transfer to US Army Air Corps as a glider pilot because of his civilian flying experience. After graduating from glider school, he was made a Flight Officer and he volunteered for hazardous duty with the 1st Air Commando Group. In December 1943, the unit was sent to India. He flew British troops, the Chindits, under General Orde Wingate on 5 March 1944, landing them at night in a small jungle clearing 100 miles behind Japanese lines in the Burma campaign.
There's an exhibit in the Air Force Museum about Coogan with a few pictures of him in Rangoon.
thank you for the additional info.