The Cold War produced tension but occasionally allowed for intelligent dialogue. "The Strategic Arms Limitation Talks refers to two rounds of bilateral talks and corresponding international treaties between the Soviet Union and the United States—the Cold War superpowers—on the issue of armament control. There were two rounds of talks and agreements: SALT I and SALT II. A subsequent treaty was START. SALT II was a second round of negotiations between Richard Nixon and Leonid Brezhnev from 1972 to 1979 between the U.S. and the Soviet Union, which sought to curtail the manufacture of strategic nuclear weapons."