In October 1955, the 465th FIS was assigned to Griffiss with F-89 Scorpion all-weather fighters. ADC activated the 4727th Air Defense Group as a headquarters for the two squadrons in February 1957 and it became a major tenant at Griffiss. The 49th FIS moved, less personnel, equipment, and aircraft from Hanscom AFB, Massachusetts and replaced the 465th FIS in October 1959, receiving, after the transfer, its McDonnell F-101 Voodoos. Later that year, when the 27th FIS departed Griffiss, the 4727th was discontinued.