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History of Marine Detachment USS Long Beach (CGN-9)

The Marine Detachment aboard USS Long Beach (CGN-9) served as an integral part of the ship’s company from her commissioning in 1961 until the Navy-wide phase-out of shipboard Marine detachments in the late 20th century. Responsible for internal security, ceremonial duties, and manning the ship’s secondary battery during General Quarters, the Marines also provided a landing force capability when needed. Throughout the Cold War, the detachment supported the cruiser’s various deployments, including Vietnam War operations and numerous show-of-force missions. The Marine Detachment was officially disbanded in the 1990s as part of a broader reorganization of Navy-Marine Corps manpower on surface ships.

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ABOUT Marine Detachment USS Long Beach (CGN-9)

  • First Nuclear-powered Guided Missile Cruiser: The USS Long Beach (CGN-9) was the world’s first nuclear-powered guided missile cruiser, commissioned in 1961, representing a major leap in naval warfare technology.
  • Marine Detachment Role: The Marine Detachment (MarDet) aboard the USS Long Beach provided internal security, manned the ship’s brig, and fulfilled ceremonial and boarding party duties.
  • Vietnam War Service: Marines aboard the Long Beach participated in the Vietnam War, where the ship provided anti-aircraft defense and guided missile support for US operations.
  • Operation Sea Orbit: In 1964, the USS Long Beach, with its Marine Detachment, took part in Operation Sea Orbit, the first all-nuclear-powered task force to circumnavigate the globe without refueling.
  • Historic Shootdown: On May 23, 1968, Long Beach became the first ship to shoot down an enemy aircraft (a North Vietnamese MiG-21) using a missile (RIM-8 Talos), marking a significant milestone in naval history. Marines were on high alert during such combat actions.
  • VIP Security: Marines provided security for high-ranking visitors, such as when President John F. Kennedy visited the Long Beach in 1962 to tour the Navy’s new nuclear fleet.
  • Integrated Teamwork: The MarDet worked closely with Navy personnel, especially during General Quarters, where Marines often manned secondary battery stations or damage control parties.
  • Unique Living Quarters: The Marine Detachment had its own berthing and mess areas, fostering a tight-knit camaraderie and distinct identity within the larger ship’s crew.
  • Deactivation: The Marine Detachment was disbanded in the late 1970s, as advances in shipboard security and technology reduced the need for Marines on board surface combatants.
  • Legacy and Honors: Former Marines of the USS Long Beach maintain reunions and share stories, preserving the legacy of those who served in one of the most advanced ships of its era.

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