START III

START III refers to a proposed agreement for nuclear arms reduction between the United States and Russia that was intended to follow the Strategic Arms Reduction Treaty (START II). While START II was signed in 1993, it never entered into force due to disagreements over various issues, including the U.S. plans for missile defense systems and Russia's concerns about its security. START III was considered as a follow-on treaty to further reduce the number of strategic nuclear warheads and deployed delivery systems.