The Strategic Arms Reduction Treaty (START) was a bilateral agreement between the United States and the Soviet Union aimed at reducing and limiting the strategic nuclear weapons of both nations. This treaty represented a significant step towards de-escalating tensions during the later years of the Cold War, highlighting a mutual recognition of the dangers posed by nuclear proliferation. START played a crucial role in shaping arms control policies, fostering dialogue between the two superpowers, and ultimately contributing to the end of the Cold War.