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
History of the Netherlands 1831, and in 1833 an armistice of indefinite duration was concluded. Belgium was effectively independent but William's attempts to recover Luxembourg and Limburg led to renewed tension. The London Conference of 1838–39 prepared the final Dutch-Belgian separation treaty of 1839. It divided Luxembourg and Limburg between the Dutch and Belgian crowns. The Kingdom of the Netherlands thereafter was made up of the 11 northern provinces. The Netherlands did not industrialize as rapidly as Belgium after 1830, but it was prosperous enough. Griffiths argues that certain government policies facilitated the emergence of a national economy in the 19th century. They included