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
Luxembourg at the 1920 Summer Olympics advance past the initial heats in the sprint event, and did not finish the 50 kilometres. Luxembourg competed in the Olympic football tournament for the first time. The team lost to the Netherlands in the first round. Three weightlifters represented Luxembourg in 1920. It was the nation's debut in the sport. Alzin won the country's first medal in the sport, a silver in the heavyweight. Two wrestlers, both in the Greco-Roman style, competed for Luxembourg in 1920. Both men lost all of their matches. Luxembourg at the 1920 Summer Olympics Luxembourg competed at the 1920 Summer Olympics in Antwerp, Belgium.