Marine Observation Squadron 6 (VMO-6) was an observation squadron of the United States Marine Corps which saw extensive action during the Battle of Okinawa in World War II and the Korean War and Vietnam War. The squadron would become the first Marine Corps helicopter squadron to participate in combat operations when they participated in the Battle of Pusan Perimeter in August 1950.[1] They were deactivated on January 1, 1977.

HMLA-267 began its history during WW2 when it was activated as VMO-5. After training at Quantico, San Diego, and Hawaii, VMO-5 headed for the western Pacific area to take part in the battle for Iwo Jima. After the war's end VMO-5 deployed to Japan for a brief period of occupation duty before returning to the US and deactivation in 1946.

During December 1966, the UH-1E training unit at Camp Pendleton, Sub Unit 1, H&MS-30 was deactivate and VMO-5 was reactivated as a temporary wartime-only squadron. VMO-5 added the OV-10A to its inventory in 1968.

March 1968 brought another change in title, with the squadron becoming HML-267. The OV-10s were transferred to VMO-2 in 1971. In 1975 the squadron began transitioning to the new UH-1N, which it still operates. The squadron added AH-1Ws, becoming HMLA-267 in 1987.