As Chancellor, Kohl was committed to European integration and especially to the Franco–German relationship; he was also a steadfast ally of the United States and supported Reagan's more aggressive policies in order to weaken the Soviet Union. Following the Revolutions of 1989 his government acted decisively, culminating in the German reunification in 1990. Kohl and French president François Mitterrand were the architects of the Maastricht Treaty which established the European Union (EU) and the Euro currency. Kohl was also a central figure in the eastern enlargement of the European Union, and his government led the effort to push for international recognition of Croatia, Slovenia, and Bosnia and Herzegovina when the states declared independence. He played an instrumental role in solving the Bosnian War. Domestically Kohl's policies from 1990 focused on integrating former East Germany into reunified Germany, and he moved the federal capital from the "provisional capital" Bonn back to Berlin, although he himself never resided there because the government offices were only relocated in 1999. Kohl also greatly increased federal spending on arts and culture. After his chancellorship, Kohl became honorary chairman of the CDU in 1998 but resigned from the position in 2000 in the wake of the CDU donations scandal which damaged his reputation domestically.