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.