in 1975; USAF ops at U-Tapao RTAFB closed out and transferred to Royal Thai Air Force. 319th Bombardment Wing (Heavy), Grand Forks AFB, North Dakota Activated to replace: 4133d Strategic Wing B-52H, 1963–1982; B-52G, 1982–1986 46th Bombardment Squadron (a/c from 30th BS) Equipped with B-1B Lancer 1987–88 Became 319th Air Refueling Wing in 1994 320th Bombardment Wing (Heavy), Mather AFB, California Activated to replace: 4134th Strategic Wing B-52F, 1963–1968; B-52G, 1968–1989 441st Bombardment Squadron (a/c from 72d BS) Tenant SAC unit on ATC base. Inactivated in 1989; Mather AFB closed in 1991 per BRAC. 340th Bombardment Wing (Heavy), Bergstrom AFB, Texas Activated to replace: 4130th Strategic Wing B-52D, 1963–1966 486th Bombardment Squadron (a/c from 335 BS) Inactivated in 1966; reactivated and equipped with FB-111s in 1968 366th Wing (Headquartered at Mountain Home AFB, Idaho; aircraft located at Castle AFB, California) B-52G, 1992–1994 34th Bombardment Squadron 34 BS equipped with B-1B Lancers in 1994 376th Strategic Wing, Kadena AB, Okinawa 4180th Bombardment Squadron (Provisional) (never made operational) Equipped with RC-135s in 1970 when B-52s withdrawn from Kadena AB. 379th Bombardment Wing (Heavy), Wurtsmith AFB, Michigan B-52H, 1961–1977; B-52G, 1977–1992 524th Bombardment Squadron Inactivated in 1993; Wurtsmith AFB closed per BRAC 380th Strategic Aerospace Wing, Plattsburgh AFB, New York B-52G, 1966–1971 528th Bombardment Squadron (a/c from 70th BS) Re-equipped with FB-111s in 1971; Inactivated 1995 and Plattsburgh AFB closed per BRAC 397th Bombardment Wing (Heavy), Dow AFB, Maine Activated to replace: 4038th Strategic Wing B-52G, 1963–1968 596th Bombardment Squadron (a/c from 341st BS) Inactivated in 1968; Dow AFB closed. 410th Bombardment Wing (Heavy), K. I. Sawyer AFB, Michigan Activated to replace 4042d Strategic Wing B-52H, 1963–1994 644th Bombardment Squadron (a/c from 526th BS) Inactivated in 1995; K. I. Sawyer AFB closed per BRAC 416th Bombardment Wing (Heavy), Griffiss AFB, New York Activated to replace 4039th Strategic Wing B-52G, 1963–1992; B-52H, 1992–1995 668th Bombardment Squadron (a/c from 75th BS) Inactivated in 1995; Griffiss AFB closed per BRAC. 449th Bombardment Wing (Heavy), Kincheloe AFB, Michigan Activated to replace 4239th Strategic Wing B-52H, 1963–1977 716th Bombardment Squadron (a/c from 93rd BS) Inactivated in 1977; Kincheloe AFB closed 450th Bombardment Wing (Heavy), Minot AFB, North Dakota Activated to replace 4136th Strategic Wing B-52H, 1963–1968 720th Bombardment Squadron (a/c from 525th BS) Inactivated in 1968 454th Bombardment Wing (Heavy), Columbus AFB, Mississippi Activated to replace 4228th Strategic Wing B-52F, 1963–1966; B-52D, 1966–1969 736th Bombardment Squadron (a/c from