Economy of Belgium increased unemployment, stemming from the worldwide banking crisis. For 50 years through World War II, French-speaking Wallonia was a technically advanced, industrial region, with its industry concentrated along the sillon industriel, while Dutch-speaking Flanders was predominantly agricultural with some industry, mainly processing agricultural products and textiles. This disparity began to fade during the interwar period. When Belgium emerged from World War II with its industrial infrastructure relatively undamaged thanks to the Galopin doctrine, the stage was set for a period of rapid development, particularly in Flanders. The postwar boom years, enhanced by the establishment of the European Union and NATO
German-speaking Community of Belgium officially considered part of the German-speaking Community of Belgium: Bleiberg-Welkenraedt-Baelen in northeastern province of Liège and Arelerland (city of Arlon and some of its nearby villages in southeastern province of Belgian Luxembourg). However, in these localities, the German language is declining due to the expansion of French. The area known today as the East Cantons consists of the German-speaking Community and the municipalities of Malmedy and Waimes (), which belong to the French Community of Belgium. The East Cantons were part of the Rhine Province of Prussia in Germany until 1920 (as the counties (') of Eupen and Malmedy), but