SALT II
Negotiations for a second round of SALT began in late 1972. Since SALT I did not prevent each side from enlarging their forces through the deployment of Multiple Independently Targeted Re-Entry Vehicles (MIRVs) onto their ICBMs and SLBMs, SALT II initially focused on limiting, and then ultimately reducing, the number of MIRVs. Negotiations also sought to prevent both sides from making qualitative breakthroughs that would again destabilize the strategic relationship. The negotiations spanned the Nixon, Gerald Ford, and Jimmy Carter administrations.