|The S.A.L.T. II Accord was reached in June of 1979. The Accord allowed both the US and USSR to build up to 2,250 missiles, of which 1,320 could be MIRVD (Multiple Independent Re-entry Vehicles). The MIRVD missiles could carry many warheads. The agreement was received with disdain by critics of the Soviets, who believed that the accord granted the Soviets the advantage. The S.A.L.T. II agreement was never ratified, as the subsequent Soviet invasion of Afghanistan eliminated any support for the treaty. The treaty's terms however, continued to be observed by both sides.