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The Strategic Arms Limitation Treaties (Russian: Переговоры об ограничении стратегических вооружений) 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. SALT II later became START. Negotiations started in Helsinki, Finland, in 1969 and focused on limiting the two countries' stocks of nuclear weapons. These treaties have led to START (Strategic Arms Reduction Treaty). START I (a 1991 agreement between the United States and the Soviet Union) and START II (a 1993 agreement between the United States and Russia) placed specific caps on each side's number of nuclear weapons.

SALT I is the common name for the Strategic Arms Limitation Treaty Agreement, but also known as Strategic Arms Limitation Treaty. SALT I froze the number of strategic ballistic missile launchers at existing levels, and provided for the addition of new submarine-launched ballistic missile (SLBM) launchers only after the same number of older intercontinental ballistic missile (ICBM) and SLBM launchers had been dismantled.

Leonid Brezhnev and Gerald Ford are signing joint communiqué on the SALT treaty in Vladivostok, November 23, 1974.

The strategic nuclear forces niche of the Soviet Union and the United States were changing in character in 1968. The U.S.'s total number of missiles had been static since 1967 at 1054 ICBMs and 656 SLBMs, but there was an increasing number of missiles with multiple independently targetable reentry vehicle (MIRV) warheads being deployed. One clause of the treaty required both countries to limit the sites protected by an anti-ballistic missile (ABM) system to one. The Soviet Union had deployed such a system around Moscow in 1966 and the United States announced an ABM program to protect twelve ICBM sites in 1967. A modified two-tier Moscow ABM system is still used, probably with missile interceptors equipped with conventional instead of nuclear warheads. The U.S. built only one ABM site to protect Minuteman base in North Dakota where the "Safeguard Program" was deployed. Due to the system's expense and limited effectiveness, the Pentagon disbanded "Safeguard" in 1975.

Negotiations lasted from November 17, 1969 until May 1972 in a series of meetings beginning in Helsinki, with the U.S. delegation headed by Gerard C. Smith, director of the Arms Control and Disarmament Agency. Subsequent sessions alternated between Vienna and Helsinki. After a long deadlock, the first results of SALT I came in May 1971, when an agreement was reached over ABM systems. Further discussion brought the negotiations to an end on May 26, 1972 in Moscow when Richard Nixon and Leonid Brezhnev signed the Anti-Ballistic Missile Treaty and the Interim Agreement Between The United States of America and The Union of Soviet Socialist Republics on Certain Measures With Respect to the Limitation of Strategic Offensive Arms. A number of agreed statements were also made. This helped improve relations between the USA and the Soviet Union.

Leonid Brezhnev and Jimmy Carter sign SALT II treaty, June 18, 1979, in Vienna.

SALT II was a second round of talks from 1972 to 1979 between the U.S. and the Soviet Union, which sought to curtail the manufacture of strategic nuclear weapons. It was a continuation of the progress made during the SALT I talks. SALT II was the first nuclear arms treaty which assumed real reductions in strategic forces to 2250 of all categories of delivery vehicles on both sides. SALT II helped the U.S. to discourage the Soviets not to arm their third generation ICBMs of SS-17, SS-19 and SS-18 types with much more MIRVs. The USSR's missile design bureaus had developed in the late 1970s experimental versions of these missiles equipped with anywhere from 10 to 38 thermonuclear warheads each. Additionally, the Soviets secretly agreed to reduce Tu-22M production to thirty aircraft per year and not to give them an intercontinental range. It was particularly important for the US to limit Soviet efforts in the INF forces rearmament area. The SALT II Treaty banned new missile programs (a new missile defined as one with any key parameter 5% better than in currently deployed missiles), so both sides were forced to limit their new strategic missile types development although US preserved their most essential programs like Trident and cruise missiles. In return, the USSR could exclusively retain 308 of its so-called "heavy ICBM" launchers of the SS-18 type.

An agreement to limit strategic launchers was reached in Vienna on June 18, 1979, and was signed by Leonid Brezhnev and President of the United States Jimmy Carter. Six months after the signing, the Soviet Union deployed troops to Afghanistan, and in September of the same year some senators like "Mr. Boeing" (Henry M. Jackson) unexpectedly discovered the so-called "Soviet brigade" on Cuba. As such, the treaty was never ratified by the United States Senate. Its terms were, nonetheless, honored by both sides until 1986 when the Reagan Administration withdrew from SALT II after accusing the Soviets of violating the pact.

Subsequent discussions took place under the Strategic Arms Reduction Treaty (START) and the Comprehensive Test Ban Treaty.

• START
• Nuclear Non-Proliferation Treaty
• Comprehensive Test Ban Treaty
• Non-Proliferation Treaty
• Threshold Test Ban Treaty
• Intermediate-Range Nuclear Forces Treaty

• Text of SALT I
• Text of SALT II
• Text of SALT II (cont.)
• Text of the treaty from the U.S. Department of State
• NuclearFiles.org Text of SALT II 1979
• Arms Control Today: U.S.-Soviet/Russian Nuclear Arms Control, June 2002.