Two LGM-118 Peacekeeper ICBMs were to be installed on two 87-foot-long launch cars. The LGM-118 Peacekeeper (known also as the MX) missile had a range of almost 6,000 miles.

In response to Soviet mobile missile systems, the U.S. developed the Peacekeeper Rail Garrison—a fleet of armored trains capable of launching nuclear strikes from anywhere on American rails.

Russia plans to create a rail network carrying nuclear missiles that can launch from the train cars. ... by the United States Air Force in 1986 as a possible way to launch Peacekeeper ICBMs.