Ground Launched Cruise Missile

Ground Launched Cruise Missile. The Ground Launched Cruise Missile (GLCM) was a key United States nuclear-armed land-based cruise missile system deployed in Europe during the final decade of the Cold War. Developed as a direct response to the Soviet Union's deployment of the SS-20 Saber intermediate-range ballistic missile, the GLCM provided a survivable and accurate counterforce capability. Its deployment under the North Atlantic Treaty Organization (NATO) was a major point of East-West tension, ultimately contributing to the arms control framework of the Intermediate-Range Nuclear Forces Treaty.

Development and Deployment

The program was initiated in the late 1970s following the 1979 NATO "dual-track" decision, which simultaneously pursued arms control negotiations with the Soviet Union while planning for the deployment of new American intermediate-range systems in Europe. The GLCM was based on the existing BGM-109 Tomahawk sea-launched cruise missile, adapted for land-mobile operations by General Dynamics. Primary basing agreements were secured with several NATO allies, including the United Kingdom, Italy, West Germany, Belgium, and the Netherlands. Deployment began in 1983 at RAF Greenham Common and RAF Molesworth in the UK, and later at sites like Comiso Air Base in Sicily, triggering widespread anti-nuclear protests across the continent and vehement political opposition from the Warsaw Pact.

Design and Capabilities

The operational missile, designated the BGM-109G Gryphon, was a land-based variant of the Tomahawk. It was propelled by a Williams International F107 turbofan engine and used a solid-fuel rocket booster for launch from its mobile Transporter-Erector-Launcher (TEL). Guidance was provided by a sophisticated combination of an inertial navigation system (INS) and TERCOM (Terrain Contour Matching), which compared onboard radar altimeter data with pre-programmed digital maps to achieve high accuracy. The missile carried a single variable-yield W84 nuclear warhead, with an estimated range of 2,500 kilometers, enabling it to strike deep into the territory of the Soviet Union and other Warsaw Pact nations from its European bases.

Operational History

The first GLCM flight test occurred at White Sands Missile Range in 1980. Full operational capability within NATO was achieved in 1988, with a total of 309 missiles deployed across five countries. The system was operated by the United States Air Force's 501st Tactical Missile Wing and associated squadrons. The missiles were maintained on continuous alert, dispersed in hardened shelters or on constant patrol with their TELs to enhance survivability against a potential first strike by Soviet forces. Despite its high state of readiness, the GLCM was never used in combat, as its sole intended role was nuclear deterrence against the Eastern Bloc.

Variants

The BGM-109G Gryphon was the only variant of the GLCM to enter production and service. It was distinct from its naval cousins, the nuclear-armed BGM-109A TLAM-N and the conventional BGM-109C, by its specific ground-launch configuration, W84 warhead, and European-targeted mission profile. Earlier test and validation vehicles used during the development phase at the Utah Test and Training Range and other facilities were prototypes leading to the final Gryphon design. Proposals for a conventional high-explosive armed version were considered but never pursued due to the system's exclusive treaty-limited role.

Treaty Compliance and Withdrawal

The 1987 Intermediate-Range Nuclear Forces Treaty (INF Treaty), signed by U.S. President Ronald Reagan and Soviet General Secretary Mikhail Gorbachev, mandated the elimination of all ground-launched ballistic and cruise missiles with ranges between 500 and 5,500 kilometers. This treaty directly targeted both the American GLCM and the Soviet SS-20 Saber. Compliance operations, monitored by on-site inspectors from the other signatory, began in 1988. The GLCMs were removed from their operational bases and destroyed, primarily by burning and crushing, with the last missile eliminated in 1991. The INF Treaty's dissolution in 2019 by the United States and the Russian Federation has since renewed interest in the development of new ground-launched cruise missile systems.

Category:Cruise missiles of the United States Category:Cold War missiles of the United States Category:Nuclear weapons of the United States