When the Germans marched into Belgium on 10 May 1940, memories of the brutal German occupation of Belgium during the First World War were still very much alive. The crimes committed by the German troops between 1914 and 1918 – such as the mass shootings of civilians – caused hundreds of thousands to flee to France. This gives the background for understanding the Belgian resistance against the Germans.
The first mass demonstration against the German occupation took place on 11 November 1940, the day of the armistice of 1918, and the first resistance groups, which emerged after May 1940, were re-using World War I structures. Thanks to their espionage, the Belgian government in exile in London was very well informed about the situation in Belgium during the entire period of occupation.
In autumn 1941, the Communist Party of Belgium formed the Onafhankelijkheidsfront/Front de l’indépendance (Independence Front, FI). With its specific aim of forming a broad anti-German movement reaching beyond any political borders, the FI was very successful. Its activities were wideranging: partisan units sabotaged German transport and communication routes and eliminated collaborators. The FI was responsible for about 250 of a total of roughly 650 underground newspapers in Belgium during the occupation period. As it was, the FI was the only resistance organisation that was regularly calling on all Belgians to help and to hide the Jewish population.