This history is one of a series being prepared by the History and Museums Division to bring to light the achievements and contributions of individual squadrons to Marine aviation. Marine Observation Squadron 6 distinguished itself throughout a period which spanned nearly five decades and three major conflicts, but its most significant contribution to Marine aviation was its pioneering use of helicopters in combat. This history is written to provide a concise operational narrative about a distinguished Marine Corps unit. Marine Observation Squadron 6's wide variety of experiences closely parallels the larger story of Marine aviation. From the 1920s through the Vietnam era, VM0-6 provided the kind of outstanding air support Marines have come to expect.

This history of HMM-161, one of the oldest helicopter squadrons in the Marine Corps, is part of the Marine Corps History and Museums Division's effort to bring to light the achievements and contributions made by individual squadrons to Marine aviation. Marine Medium Helicopter Squadron 161 has distinguished itself throughout its history. The squadron is noted for its work in developing the helicopter as a tactical tool for the Marine Corps and its ability to accomplish its mission regardless of the circumstances. Marine Medium Helicopter Squadron 161 enjoys a rich heritage, steeped in tradition, which was created through years of hard work and dedicated service. As a neophyte in Korea, HMR-161 tested the Marine Corps' newly developed concept of vertical assault during many landing exercises while continuing to support the 1st Marine Division. Flying in the rugged mountains of Korea, HMR-161 proved that helicopters could survive in combat and effectively carry out their mission of supporting the ground troops.