51st Pursuit Group (51st PG) / 51st Fighter Group (51st FG)
U.S. Army Air Force (USAAF), 10th Air Force (10th AF)

Background
Prewar, activated as the 51st Pursuit Group (51st PG) in the U.S. Army Air Corps (USAAC). On May 15, 1942 redesignated 51st Fighter Group (51st FG) in the U.S. Army Air Force (USAAF). During World War II, the 51st Fighter Group (51st FG) was part of the 10th Air Force (10th AF) operating in China Burma India (CBI).

Headquarters Squadron (HQ Squadron)
The Headquarters Squadron.

16th Fighter Squadron (16th FS)
The 16th Fighter Squadron.

25th Fighter Squadron (25th FS)
The 25th Fighter Squadron.

During November 1942 operats from Sadiya Airfield in India.

On April 2, 1943 a detachment operating from Sadiya Airfield in India transfers to Jorhat Airfield.

26th Fighter Squadron (26th FS)
The 26th Fighter Squadron.

449th Fighter Squadron (449th FS)
The 449th Fighter Squadron (449th FS) operated the P-38 Lightning in China.