The U.S. Missile term is composed of six different missiles, each with their own unique characteristics. The first is the TITAN, a two-stage intercontinental ballistic missile developed in the 1950s and 1960s. The second is the ROC, a short-range surface-to-air missile developed in the 1970s. The third is the SAM, a medium-range surface-to-air missile developed in the 1950s and 1960s. The fourth is the NIKE, an anti-aircraft missile developed in the 1950s and 1960s. The fifth is the THOR, an intermediate-range ballistic missile developed in the 1950s and 1960s. Finally, the sixth is the POLARIS, a submarine-launched ballistic missile developed in the 1960s. The last is the MINUTEMAN, an intercontinental ballistic missile developed in the 1960s. All of these missiles were developed by the United States to provide defense against potential threats.