Britain faced Germany alone in World War 2 until the Soviet Union and USA joined in 1941. Although victorious, Britain's role as a great power declined after the war as it was eclipsed by the USA and Soviet Union. In the post-war period, Britain dismantled its empire and joined the EEC, experiencing tensions with its "special relationship" with the USA and conflict in the Falklands War. At home, the NHS was established in 1948 and postwar consensus politics pursued greater equality until challenged by Margaret Thatcher's right-wing government in 1979, which cut welfare, denationalized industries, and reined in unions.