Headquarters and Maintenance Squadron 56 was activated 31 January 1967 at MCAS(H) Santa Ana, CA. The squadron was tasked with providing administrative and logistics support, and Intermediate Level maintenance to MAG-56 and its squadrons.
On 2 September, 1969, Sub Unit #1 was formed at Camp Pendleton to support HML-267.
H&MS-56 was deactivated 15 July, 1971, and redesignated H&MS-16.
Activated 31 January 1967 at Santa Ana,
California, as Headquarters and Maintenance Squadron 56, Marine
Aircraft Group 56, 3d Marine Aircraft Wing, Fleet Marine Force,
Sub Unit #1 activated 2 September 1969 at MCALF Camp Pendleton.
Deactivated 15 July 1971.
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