History of Luxembourg The bombardments ended with the American Army nearing Lampaden on February 22, 1945. Altogether, of a pre-war population of 293,000, 5,259 Luxembourgers lost their lives during the hostilities. After World War II, Luxembourg abandoned its politics of neutrality, when it became a founding member of the North Atlantic Treaty Organization (NATO) and the United Nations. It is a signatory of the Treaty of Rome, and constituted a monetary union with Belgium (Benelux Customs Union in 1948), and an economic union with Belgium and the Netherlands, the so-called BeNeLux. Between 1945 and 2005, the economic structure of Luxembourg changed significantly. The
Provinces of Belgium and Luxembourg, as well as parts of modern Germany and France, comprised a number of rival and independent feudal states of varying sizes. These each had their own identities and governments, though in the early modern period almost all the Belgian states became part of larger entities (the Seventeen Provinces (1549-1581) and the Southern Netherlands (after 1581)). Prominent early states in the area of modern Belgium included the Duchy of Brabant, the County of Flanders, the Prince-Bishopric of Liège and the Duchy of Luxembourg; smaller ones included the County of Hainaut, the Duchy of Limburg and the County of Namur,