Dutch resistance developed relatively slowly, but the event of the 1941 February strike and its cause, the random police harassment and deportation of over 400 Jews, greatly stimulated resistance. The first to organize themselves were the Dutch communists, who set up a cell-system immediately. Some other very amateurish groups also emerged, notably De Geuzen, set up by Bernardus IJzerdraat, as well as some military-styled groups, such as the Order Service (Dutch: Ordedienst).