The Weerbaarheidsafdeling (WA; "Resilience Department") was the paramilitary arm of the National Socialist Movement in the Netherlands (NSB), the fascist political party that collaborated with the German occupiers of the Netherlands during World War II. The organization, roughly equivalent to the German SA, was founded in 1932 by Anton Mussert, co-founder of the NSB in 1931 and its leader until the end of the war. Members wore and marched in black uniforms and were thus called "blackshirts". In 1933 the Dutch government banned the wearing of uniforms (by civilians), and the WA was disbanded in 1935 in order to forestall the Dutch government's banning it. In 1940, after the German invasion, the WA became openly active again, and more ruthless than before. They specialized in violent attacks