What is the Strategic arms limitation treaty?

This was a treaty between the united states (durring the presidency of Richard Nixon) and the Soviet Union (under Premier Brezniev) which planned to stop the ever increasing number of ICBMs deployed by both nations. This allowed the Soviet Union to come to a parity with the United States and held the United States from expanding their stock pile. The three principla delivery systems affected were long range bombers, Submarines (SLBM), and land based ICBMs. The treaty was signed in the early 1970's.