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
Limburg (Netherlands) of the new province. When the Catholic and French-speaking Belgians split away from the mainly Calvinist northern Netherlands in the Belgian Revolution of 1830, the Province of Limburg was at first almost entirely under Belgian rule. However, by the 1839 Treaty of London, the province was divided in two, with the eastern part going to the Netherlands and the western part to Belgium, a division that remains today. With the Treaty of London, what is now the Belgian Province of Luxembourg was handed over to Belgium and removed from the German Confederation. To appease Prussia, which had also lost access