Air National Guard F-100s in South Vietnam In 1968, four Air National Guard (ANG) F-100 squadrons deployed to Southeast Asia to provide close air support for friendly troops in South Vietnam. The first was the Colorado ANG 120th Tactical Fighter Squadron (TFS) in May 1968, followed by the 174th TFS (Iowa), 188th TFS (New Mexico) and the 136th TFS (New York). Also, the 355th TFS, an active duty USAF squadron, was manned by volunteer Guardsmen from New Jersey and Washington, D.C. These five squadrons flew an impressive 30,000 combat sorties (one sortie is one aircraft flying one mission) during their year-long tour in South Vietnam. Click here to return to the AFRES/ANG Overview.