 On 1 January 1966, the 4503rd Tactical Fighter Squadron equipped with the F-5A "Skoshi Tiger" moved to the base for trial operations over North Vietnam and Laos.The F-5s returned to Bien Hoa in early February and returned to Da Nang AB from 20 February to 10 March when they returned again to Bien Hoa and were redesignated as the 10th Fighter Squadron.On 8 January 1966, the 37th Aerospace Rescue and Recovery Squadron (37th ARRS) was activated at Da Nang AB operating 5 HU-16s on loan from the 31st ARRS and the 33rd ARRS, the squadron was responsible for aircrew recovery over North Vietnam, Laos and the Gulf of Tonkin.