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The Ground Launched Cruise Missile, or '''GLCM''', (officially designated BGM-109G Gryphon) was the United States Air Force 's counter to the mobile medium- and intermediate- range ballistic Nuclear Missile s deployed by the Soviet Union in Eastern Bloc European countries during the latter years of the Cold War . The GLCM and the U.S. Army 's Pershing II were the incentives that fostered Soviet willingness to sign the Intermediate-Range Nuclear Forces Treaty (INF treaty), and thus reducing both the number and the threat of Nuclear Warhead s in Europe. GLCM is also a generic term for any ground-launched cruise missile. Since the US deployed only one modern cruise missile in the tactical role, the GLCM name stuck. The GLCM was built by General Dynamics . DESIGN & EMPLOYMENT GLCM was developed as a ground-launched variant of the Tomahawk missile in use by the U.S. Navy (and the capability for use by the Air Force). Unlike other variants of the Tomahawk, the GLCM carried only a nuclear warhead; no conventional capability was provided. The warhead, coded W84, was a Variable-yield kiloton-range weapon. Some estimates put the yield at between 10 and 50 kT. As a primarily tactical weapon, it almost certainly did not match the 200-kT yield of the W80 warheads found on the ALCM or Tomahawk SLCM. The Pentagon credited the GLCM with a range of 2000-2500 kilometers. Like other US Cruise Missiles of this period, accuracy after more than 2000km of flight was within half the width of a Football Field or 80 ft (approximately 24 meters). The missile was entirely Subsonic , powered by a Turbofan engine with a Rocket booster assisting at launch.. 1 Militarily, the GLCM was targeted against fixed targets -- at the outer edge of its range, the missile's flight time with its subsonic Turbofan was more than 2 1/2 hours. This contrasted sharply with Pershing II , which had a flight time of 10-15 minutes. However, the range of the GLCM gave it the ability to strike deep within then- Soviet territory, and the weapon's low-altitude flight profile, TERCOM guidance, and low RCS made it far less likely that the a GLCM launch would be detected in time to intercept the Cruise Missile . DEPLOYMENT & PROTEST Designed to be road-mobile, BGM-109 was carried in a four-pack on a wheeled transporter/erector/launcher TEL , and could travel in convoy. Normal basing was in shelters at military installations, with deployment to other sites, on- or off-road, to be carried out in an alert situation. GLCMs were deployed in Great Britain , Belgium , Netherlands , Germany , and Italy . Initial operating capability (or IOC) occurred in 1983 . The launchers (sans warheads) were sent out on a number of simulated scrambles. 4 TEL s and their missiles (including reloads) made up each flight of GLCMs.. 2 Although deployed in the face of a range of Soviet IRBM s, including the brand-new and extremely capable SS-20 Saber, the 'Glick-em' (the phonetic nickname of the GLCM) faced widespread public protest in Europe . Many Anti-nuclear Europeans felt that the United States was deploying weapons meant to win a tactical nuclear war, without adequate consideration of the effects that even a 'victory' would bring. Critics also argued that the Reagan Administration was unduly escalating tensions in Central Europe. Between them, GLCM and the Pershing II made a lethal combination. GLCM missiles could be launched, undetected, followed 2 hours later by a Pershing strike, which would fly so quickly that no response could be made before the Pershings struck. Aside from presenting an attractive course of action to NATO commanders in the event of Soviet aggression, it put the Kremlin leaders (in range of the GLCM and possibly the Pershing, even in Moscow ) in a position of fearing a decapitating NATO first strike - moving them toward a launch-on-warning policy. GLCM & THE INF Ironically, and despite the protesters' fears to the contrary, the deployment of GLCM actually brought greater stability to Central Europe, and lessened the incentive/need for a tactical nuclear exchange, through the mechanism of the (dubbed the Tomahawksi in the Western press) and its supersonic follow-on, the SSC-X-5 cruise missiles.. 3 GLCM was removed from Europe beginning in 1988 , and all units were removed from service by 1991 , being either destroyed or converted into displays. Eight missiles survive for static display only. No follow-on design has been authorized.. 4 SEE ALSO SOURCES
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