An agreement signed in 1972 by US President Richard Nixon and Soviet Union leader Leonid Brezhnev to begin to reduce the number of nuclear weapons owned by America and the Soviet Union
The agreement restricted the number of ICBMs (Intercontinental Ballistic Missiles) both sides could have, but was criticised by some for not limiting the production of new nuclear weapons
Countries were signing up to recognise the European borders established after World War Two as well as to some basic human rights such as freedom of speech
Carter was a Democrat and had a different view on the USA's foreign relations and place in the world, and he criticised the USSR for its human rights abuses
These were a new type of battlefield nuclear weapon, leading many in the West to believe that the Soviets had not abandoned the idea of nuclear war or expansionism in Europe
With the arms race apparently on again, and then the Soviet invasion of Afghanistan in 1979, the US Congress refused to ratify SALT II, a second agreement of the Strategic Arms Limitation Talks
Afghanistan bordered some of the southern Soviet republics of the USSR, making it easy for Moscow to support a communist-led government led by Taraki when it seized power in Kabul in April 1978
Seeing the situation in Afghanistan as an extension of the Cold War, the US supported the Mujahideen against their old enemy, the USSR, and refused to sign SALT II
The US President, Jimmy Carter, announced that the US was extending its policy of containment to the Middle East and was prepared to use force to stop any country from gaining control over the oil rich states of the Middle East
Carter formed an alliance with China and Israel to support the Mujahideen rebels against the USSR, and the CIA secretly provided the Mujahideen with weapons and funds
The USA also imposed economic sanctions on the Soviet Union and abolished most US-Soviet trade, which led to deterioration in diplomatic relations between the superpowers
Afghanistan became the Soviet Union's Vietnam: an expensive, embarrassing war with little hope of victory, where they were beaten by local guerrilla forces
It dragged on until 1988 when the Soviet leader, who by then was Mikhail Gorbachev, signed a deal to end the war and the last Soviet troops left Afghanistan in February 1989