Its last assignment was with the 405th Tactical Training Wing, being inactivated at Luke Air Force Base, Arizona, on 19 November 1990.

With its training as a unit completed, the members of 426th NFS packed their bags and left California's sunny San Joaquin Valley in mid-June 1944.

When P-61s were unloaded on the Calcutta docks on 25 September, these partially disassembled craft were transported to Barrackpore where they were reassembled by the Air Service Command.

During the next couple of weeks, the planes would be rotated to Ondal, where Air Service Command modified them (one of the modifications being additional radio equipment).

[1] 5 October marked the start of the 426th's combat deployment; four aircraft were sent to Chengtu Airfield, China, Upon their arrival the mission of the 426th NFS was night defense for the Twentieth Air Force B-29 Superfortresses based there.

The 426th started staging out of Ankang, Liangshan, and Sian (now known as Xi'an), China, from which they attacked communication, motor transport and railway lines until the end of the war.

Its mission was to train Aerospace Defense Command (ADCOM) fighter-interceptor squadron pilots flying F-106 Delta Darts to intercept intruder aircraft.

As part of the phase-out of the F-100 from active service, it received McDonnell F-4C Phantom IIs in August 1971, with aircraft carrying a blue fin cap.