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Weapons of Mass Destruction (WMD)

LGM-118A Peacekeeper


Once Minuteman III deloyment was underway, Strategic Air Command's planners began their search for a third-generation ICBM. SAC again sought the most technologically advanced system to secure increased range, variable warhead yields, and pinpoint accuracy. Several issues complicated the development and acquisition of a new ICBM system. The increased accuracy of Soviet missile systems spawned an intense debate over the survivability of fixed missile sites and the best method for basing the third-generation ICBM. However, the issue of funding, given an atmosphere of burgeoning federal deficits and cost-cutting measures, impeded SAC's efforts to acquire a new missile. Nonetheless, SAC persevered and brought the Missile-X into the ICBM inventory as the Peacekeeper missile.

The search for a system to replace the Minuteman began in 1971. Strategic Air Command, believing Minuteman technology to be obsolete, wanted a new missile that incorporated the most advanced technology available. Essential elements on SAC's list of requirements were increased range, greater accuracy, and variable yield warheads to capitalize on multiple independently-targetable reentry vehicle technology. Progress toward the new missile was made on 4 April 1972 when Headquarters Air Force assigned the designation "Missile-X" (M-X) to the advanced ICBM and made the Space and Missile Systems Organization (SAMSO) responsible for developing it.

The issue of hardened silos versus mobility surfaced almost immediately as a major M-X stumbling point. Improvements in Soviet ICBM forces and missile accuracy raised serious concerns over the ability of silo-based ICBMs to survive an attack. Proposed solutions to the problem were hardened silos and a mobile basing system. Strategic Air Command objected to mobile basing in 1973 because of its high expense, poor accuracy, and slow reaction time. Meanwhile, the defense community continued to explore both solutions. One approach to mobility was an air-mobile system, and during a 24 October 1974 test of the concept, SAMSO successfully launched a Minuteman I from a C-5A cargo aircraft. One month later, the Secretary of Defense, under intense political pressure to resolve basing issues and produce an economical missile system, pushed the M-X's initial operational capability from 1983 to 1985. At the same time, he initiated studies to determine the feasibility of developing a common M-X/Trident missile. In July 1976, Congress, convinced that silo-based missiles would be vulnerable to Soviet ICBMs, refused to appropriate funds for validation of a silo-based M-X system. Congress also deleted funds for air-mobile basing and directed validation of either a buried trench or shelter basing plan.

The defense establishment examined nearly forty basing modes before President Carter made his 12 June 1979 decision to proceed with full scale engineering development of the Missile-X. The President augmented this decision on 7 September 1979 with the selection of a horizontal multiple protective shelter basing plan for the new missile. Full scale engineering development began one week later.

Of all the MX ballistic missile deployment concepts, perhaps none was as elaborate as deep basing. In this concept, peacekeeper missiles were to be transported by rail through an extensive maze of rock tunnels. The tunnels were deep enough to protect the missiles and support facilities from the direct hit of large nuclear bombs. After attack, tunnels or shafts were bored to the surface and the missiles could then be launched. Special Projects studied concept variations for several years during the eighties. The studies included tunnel excavation, mucking, and support systems; underground nuclear, diesel generator, and fuel cell power plants; and ice, water, and steam heat sinks. During these studies, tunnel facilities were characterized and construction cost estimates and schedules were prepared.

In the eighties, the design commenced on the rail garrison facilities required to deploy the MX ballistic missile. In the original horizontal shelters concept, missiles were transported by trailer erector launchers (TEL) through a maze of roadways leading to hardened shelters. The concept used both decoys and real missiles to enhance survivability. Design of a base fire station had already started when this deployment concept was canceled by the new administration.

President Reagan, desiring more rapid deployment of the new missile, canceled the horizontal shelter plan on 2 October 1981 and advocated the deployment of a limited number of M-X missiles in superhardened Titan II or Minuteman silos. On 22 November 1982, the President further refined his position by announcing Closely Spaced Basing as the final solution to the M-X basing problem. President Reagan used the same speech to indicate his preference for "Peacekeeper" as the name of the M-X missile. Congress, which had rejected interim Peacekeeper basing in Minuteman silos in March 1982, also rejected Closely Spaced Basing and refused to approve Peacekeeper funding. The Congress further insisted that the President undertake a comprehensive technical assessment of the ICBM and basing alternatives.

President Reagan responded by first directing Headquarters Air Force to conduct a technical assessment. The Air Force report, completed in March 1983, advocated deployment of a new, highly accurate ICBM in sufficient numbers to eliminate the Soviet Union's "coercive advantage." The Air Force also recommended concurrent deployment of a survivable basing method that allowed credible, effective, and timely retaliation. A critical point in the Air Force assessment was the need to deploy an ICBM quickly as a demonstration of national resolve to preserve deterrence.

President Reagan also appointed a Commission on Strategic Forces chaired by Lieutenant General Brent Scowcroft. The Scowcroft Commission's report, issued on 6 April 1983, encouraged the development of a small single-warhead ICBM to meet the long-range threat, but recommended the immediate deployment of 100 Peacekeeper missiles in existing Minuteman silos to demonstrate national will and to compensate for the retirement of Titan II ICBMs. The Scowcroft report also encouraged a vigorous examination of all basing alternatives. President Reagan and Congress concurred with the Scowcroft Commission's findings and on 10 August 1983 the Secretary of Defense instructed the Air Force to deploy 100 Peacekeepers in Minuteman silos at F.E. Warren AFB, Wyoming. At the same time, the Defense Secretary directed the Air Force to initiate design of a small, single-warhead ICBM.

The Air Force successfully conducted the first test flight of the Peacekeeper June 17, 1983, from Vandenberg Air Force Base, Calif. The missile traveled 4,190 miles (6,704 kilometers) before dropping six unarmed test re-entry vehicles on planned target sites in the Kwajalein Missile Test Range in the Pacific Ocean.

The first two test phases consisted of 12 test flights to ensure the Peacekeeper's subsystems performed as planned, and to make final assessments of its range and payload capability. The missile was fired from above-ground canisters in its first eight tests. Thereafter, test flights were conducted from Minuteman test silos reconfigured to simulate operational Peacekeeper sites.

Peacekeeper production began in February 1984. Under plans prepared by Strategic Air Command, 50 Minuteman IIIs assigned to the 400th Strategic Missile Squadron, 90th Strategic Missile Wing, F.E. Warren AFB, Wyoming, were be removed and replaced with Peacekeeper missiles, which had an estimated service life of twenty years. Peacekeeper deployment was scheduled to begin in January 1986 and initial operational capability was set for December of the same year. The second increment of 50 missiles would replace Minuteman IIIs belonging to the 319th Strategic Missile Squadron at F.E. Warren. The expected completion date of the deployment was December 1989.

These plans were interrupted in July 1985 when Congress limited Peacekeeper deployment to 50 missiles until the administration could produce a more survivable basing plan. President Reagan's solution for basing the remaining 50 missiles, announced 19 December 1986, was Peacekeeper Rail Garrison. Three days later, the 90th SMW achieved initial operational capability for Peacekeeper by placing the first flight of ten missiles on strategic alert. Full operational capability occurred in December 1988, when the 90th Strategic Missile Wing accepted the fiftieth Peacekeeper missile.

By the late eighties, the deployment had changed to a rail car mounted launcher. The launchers were in train alert shelters for protection from a possible accidental explosion with three shelters per garrison. During an alert, the trains could roam over a large rail network becoming elusive targets. Final design for project was completed in 1990 when this concept was also canceled.

Under the rail garrison concept, the remaining Peacekeeper missiles would be placed on trains stationed at various U.S. Air Force installations. The 25 trains, each carrying two missiles, would deploy off-base and onto the national railroad network during periods of international tension to improve survivability. F.E. Warren AFB would serve as the Main Operating Base for the rail garrison force. In February 1987, the Air Force selected ten additional bases as candidate rail garrison locations. That same year, Congress appropriated $350 million to fund rail garrison research and development. Exercises conducted in 1988 tested and refined the concept of operations, and in May the Secretary of Defense authorized the Air Force to proceed with Peacekeeper Rail Garrison full scale development.

A further review of ICBM moderization produced a Presidential decision in April 1989 that limited the Peacekeeper system to the existing 50 missiles but directed they be redeployed from silos to rail garrison. In November, the Air Force announced the selection of seven bases to house Peacekeeper Rail Garrison. The Main Operating Base would be F.E. Warren AFB, Wyoming, and the other six bases were Barksdale AFB, Louisiana; Little Rock AFB, Arkansas; Grand Forks AFB, North Dakota; Dyess AFB, Texas; Wurtsmith AFB, Michigan; and Fairchild AFB, Washington. December 1992 was the date established for delivery of the first asset.

The Air Force achieved initial operational capability of 10 deployed Peacekeepers at F.E. Warren AFB, Wyo., in December 1986. Full operational capability was achieved in December 1988 with the establishment of a squadron of 50 missiles.

Ballistic Missile Organization, Air Force Materiel Command (now Detachment 10, Space and Missile Systems Center), began full-scale development of the Peacekeeper in 1979. This organization, located at San Bernadino, Calif., integrated the activities of more than 27 civilian contractors and numerous subcontractors to develop and build the Peacekeeper system.

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