Belgium felt he had collaborated with Germany during the war. The Belgian Congo gained independence in 1960 during the Congo Crisis; Ruanda-Urundi followed with its independence two years later. Belgium joined NATO as a founding member and formed the Benelux group of nations with the Netherlands and Luxembourg. Belgium became one of the six founding members of the European Coal and Steel Community in 1951 and of the European Atomic Energy Community and European Economic Community, established in 1957. The latter has now become the European Union, for which Belgium hosts major administrations and institutions, including the European Commission, the Council
Fortress of Luxembourg garrison consisted exclusively of Prussian troops: the Netherlands never provided their one-quarter of the garrison. Later, the Luxembourg-Prussian Treaty of 17 November 1856 gave Prussia the exclusive right to garrison troops in Luxembourg. In the 1830, the southern provinces of the United Kingdom of the Netherlands broke off to form the Kingdom of Belgium. At the outbreak of this Belgian Revolution, most Luxembourgers joined the rebels, and from 1830 to 1839 almost all of Luxembourg was administered as part of Belgium. The fortress and city of Luxembourg, held by the Dutch and Prussian troops, was the only part of the