F.E. Warren Air Force Base in Laramie County, Wyoming — The American West (Mountains)
Peacekeeper (MX) ICBM
Photographed by William Fischer, Jr., September 29, 2026
1. Peacekeeper (MX) ICBM Marker
The Peacekeeper (MX) missile, the largest missile shown here, began operations in 1985. Fifty Minuteman III missiles were deactivated and fifty Peacekeeper missiles were placed in the modified Minuteman III silos. The Peacekeeper missile carries ten independently targeted warheads. It is a three stage missile with a diameter of 7 feet 8 inches and weighs 195,000 pounds. The missile is ejected from its silo by high-pressure steam to an altitude of about 300 feet before its rocket engines fire. It is also controlled from an underground control center manned by two missile officers- the men with the "key" that launches the missiles. The missiles cannot be launched without a series of controlled commands and codes, and the direct order of the President. Two launch control officers in each of two separate underground control centers must receive codes and turn their keys to launch a missile.
Erected by F.E. Warren Air Force Base.
Topics. This historical marker is listed in these topic lists: Air & Space • War, Cold. A significant historical year for this entry is 1985.
Location. 41° 8.783′ N, 104° 50.462′ W.
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Regionally, this marker is in the Laramie Basin and in Greater Cheyenne. It is also in the American Mountain West, on the Great Plains, and specifically on the High Plains. Globally, it is in North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once the Louisiana Purchase.
Other nearby markers. At least 8 other markers are within walking distance of this marker: Intercontinental Ballistic Missiles (a few steps from this marker); Minuteman I and III ICBMs (within shouting distance of this marker); Bell UH-1F Huey Helicopter (within shouting distance of this marker); United States Air Force Mission (about 300 feet away, measured in a direct line); The Military 1867-1949 (approx. ¼ mile away); "Buffalo Soldiers" (approx. ¼ mile away); The Military 1867-1890 (approx. ¼ mile away); The Military 1949-Present
Photographed by William Fischer, Jr., September 29, 2026
2. Peacekeeper (MX) ICBM and Marker
More about this marker. The Peacekeeper and marker are in the Air and Missile Park, at the F.E. Warren Air Force Base main gate, but not needing proper identification to enter. Park in the Visitor Center parking lot and carefully cross Randall Avenue.
Also see . . . Martin Marietta LGM-118A Peacekeeper (National Museum of the United States Air Force). (Submitted on November 3, 2026, by William Fischer, Jr. of Reynoldsburg, Ohio.)
Photographed by William Fischer, Jr., September 29, 2026
3. ICBMs in F.E. Warren AFB Air and Missile Park
L to R: Peacekeeper, Minuteman III, and Minuteman I
Credits. This page was last revised on November 3, 2026. It was originally submitted on November 3, 2026, by William Fischer, Jr. of Reynoldsburg, Ohio. This page has been viewed 5 times since then. Photos: 1, 2, 3. submitted on November 3, 2026, by William Fischer, Jr. of Reynoldsburg, Ohio.
