 In September 1969 the 4th Air Commando Squadron ceased operating from the base and moved its forward operating base to Da Nang Air Base.On 3 February 1968 the 355th Tactical Fighter Squadron (355th TFS) was attached to the 37th TFW.On 5 May 1968 the 174th Tactical Fighter Squadron (174th TFS) an Iowa Air National Guard unit equipped with F-100Cs deployed to Phù Cát AB.