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via Philippe Dognon
HMT-301 was originally activated 1 April 1966 at MCAS(H) Santa Ana as Marine Medium Helicopter Training Squadron 301, and assigned to Marine Helicopter Training Group 30, 3d Marine Aircraft Wing. The squadron was supposed to provide transition/refresher training for CH-46 pilots and crews, but delays in delivery led to the squadron operating the UH-34D and SH-34G/J. During 1968 the squadron transitioned to the CH-53A and redesignated as HMHT-301.
On 31 March 1972, MHTG-30 deactivated. Its subordinate squadrons, HMHT-301 and HMMT-302 were combined to form HMT-301. HMT-301 served as a composite CH-46/CH-53 training squadron until 31 December 1994, when the squadron deactivated.
HMT-301 was reactivated 30 December 1995 at MCAS Kaneohe Bay. The squadron operated CH-53Ds until it deactivated again on 3 June 2005.
Activated 1 April 1966 as Marine Medium Helicopter Training Squadron 301, Marine Helicopter Training Group 30, 3d Marine Aircraft Wing, FMF.
Redesignated 1 May 1968 as Marine Heavy Helicopter Training Squadron 301.
Redesignated 31 March 1972 as Marine Helicopter Training Squadron 301.
Deactivated 31 December 1994.
Reactivated 30 December 1995 at MCAS Kaneohe Bay, Hawaii, and assigned to MAG-24.
Deactivated 3 June 2005.