and two of the Four Asian Tigers in the 1990s. Following democratic reforms in 1988, neoliberal policies were implemented by President Kim Young-sam (South Korea) and President Lee Teng-hui (Taiwan), both who led their countries during the 1997 Asian financial crisis. Japan saw eight different prime ministers serve during the 1990s in what was at first called the "Lost Decade" but later became referred to as the "Lost Decades of the Heisei Era". These included Morihiro Hosokawa, who won the 1993 Japanese general election and formed an opposition coalition until 1996. Europe The improvement in relations between NATO countries and the former members of the Warsaw Pact led to the end of the Cold War, both in Europe and other parts of the world. German reunification – on 3 October 1990, East and West Germany reunified as a result of the collapse of the Soviet Union and the fall of the Berlin Wall. After reintegrating their economic structure and provincial governments, Germany focused on the modernization of the formerly communist East. People brought up in socialist East Germany became integrated with those living in capitalist West Germany. Margaret Thatcher, who had been the United Kingdom's Prime Minister since 1979, resigned as Prime Minister on 22 November 1990 after being challenged for leadership of the Conservative Party by Michael Heseltine. This was because of widespread opposition to the introduction of the controversial Community Charge, and the fact that her key allies such as Nigel Lawson and Geoffrey Howe resigned over the deeply sensitive issues of the Maastricht Treaty and Margaret Thatcher's resistance to Britain joining the European Exchange Rate Mechanism. Less than two years later, on the infamous Black Wednesday of September 1992, the pound sterling crashed out of the system after the pound fell below the agreed exchange rate with the Deutsche Mark. John Major replaced Margaret Thatcher as Prime Minister in 1990. The Perestroika (restructuring) of the Soviet Union destabilized, leading to nationalist and separatist demagogues gaining popularity. Boris Yeltsin, then chairman of the Supreme Soviet of Russia, resigned from the Communist Party and became the opposition leader against Mikhail Gorbachev. The Communist Party lost its status as the governing force of the country and was banned after a coup attempt by Communist hardliners attempted to revert the effects of Gorbachev's policies. Yeltsin's counter-revolution was victorious, and on 25 December 1991, Gorbachev resigned from the presidency, which led to