Until 1943 there was little effective resistance to the German occupation of The Netherlands. Though numerous small opposition groups had formed immediately after the German invasion in 1940, there was no concerted movement or over-arching organisation. Gradually, though, as the Germans introduced harsher measures against certain groups, opposition grew, particularly in the urban areas. These met with very limited success due to poor security which was to plague the Dutch resistance movement in general. As is made clear in this official account, individuals were often members of more than one resistance group at the same time. This inevitably meant that when one cell was compromised others quickly met the same fate. Nevertheless, in 1941 the Netherlands, or N, Section of the Special Operations Executive under Major Seymour Bingham started sending trained agents to The Netherlands. These operatives were dropped by parachute or infiltrated into the country from France or Belgium. Unfortu