Dinjan Airfield, also known as Dinjan Air Force Station, is an air base of Indian Air Force. Established as an air field in World War II, it is located in Dinjan, approximately seven miles northeast of Chabua, in the state of Assam, India. The fall of Singapore and Rangoon in early 1942 propelled Dinjan airbase to be the centre of attention as the main supply line between India and China. It housed a major hospital for evacuees from Burma during the Second World War. It was abandoned after the war, till 1964 when Indian Air Force established its surveillance base here. It houses one squadron of Apache attack helicopters. History Dinjan Airfield was built on an Assam tea plantation by thousands of plantation laborers, beginning in March 1942, as a result of the Japanese invasion of Burma in December 1941. It opened in the spring of 1942 with No 5 Squadron RAF and a squadron of Curtis Mohawk fighter aircraft, which remained until the Autumn of 1942 before moving to Agatala; This unit's primary mission was the protection of cargo aircraft flying over The Hump from nearby Chabua Airfield to China. The site was also occupied by 11th Bombardment Squadron (7th Bombardment Group), USAAF between June and October 1942. The squadron was initially equipped with a mixture of B-25 Mitchells and LB-30s (B-24A Liberators) and flew missions against targets in Burma. In October 1942, the Indian Air Task Force was activated at Dinjan to support Chinese resistance along the Salween River by hitting supply lines in central and southern Burma. The task force controlled operational activities of all Army Air Force units in India. 9th Photo Reconnaissance Squadron, March - July 1943; September 1943 - May 1944 (Detachment) 20th Tactical Reconnaissance Squadron, May - June 1944 Assigned to Assam American Base Command (part of India Air Task Force). The mission of these units was photographic mapping in Burma. It flew F-4/F-5 (P-38) Lightnings. 51st Fighter Group, October 1942 - October 1943 This unit was equipped with Curtiss P-40 Warhawks and Lockheed P-38 Lightnings. The group defended the Indian terminus of the "Hump" airlift route over the Himalayan Mountains and airfields in that area. The group flew strafing, bombing, reconnaissance and patrol missions in support of Allied ground troops during a Japanese offensive in northern Burma in 1943. It was transferred from Dinjan to Kunming, China and was reassigned from the