89 Squadron RAF, flying radar-equipped Bristol Beaufighter night fighters in defence of Calcutta.

[1] That night, it flew its first operational sorties, with Flight Sergeant Arthur Pring shooting down three Japanese Mitsubishi Ki-21 bombers in four minutes, becoming an air ace.

[2][a] On the night of 19/20 January, another of 176's aircraft intercepted three more Ki-21s, claiming two destroyed and one damaged, but itself being shot down by return fire from the bombers.

The losses of four bombers in a few days caused Japanese night attacks on Calcutta to be suspended.

[4] Detachments of the squadron were then based at Chittagong Burma, Ratmalana Ceylon, Baigachi and Mingaladon where the Beaufighters were replaced with Mosquitos in June 1945.