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
Provisional Government of the Northern Region affairs under chief administrator of Northern Region but use of former name (Provisional Government of the Northern Region) continued. On 19 February 1920, the Northern Region government evacuated Arkhangelsk to Norway. On 21 February 1920, Arkhangelsk and Murmansk is reintegrated into the Russian Socialist Federative Soviet Republic. On 13 March 1920, regular Soviet troops reached Murmansk. On 2 February 1920, the Murmansk Governorate was created by a resolution of the Provisional Government of the Provisional Government of the Northern Region. It included Alexandrovsky and Kemsky Uyezds of Arkhangelsk Governorate and parts of the Olonets Governorate. During its height of control,