In May 1940, Germany invaded the Netherlands, Luxembourg, Belgium, and France. After Belgium's surrender, the country was ruled by a German military governor, Alexander von Falkenhausen, who enacted anti-Jewish measures against its 90,000 Jews, many of them refugees from Germany or Eastern Europe. In the Netherlands, the Germans installed Arthur Seyss-Inquart as "Reichskommissar", who began to persecute the country's 140,000 Jews. Jews were forced out of their jobs and had to register with the government. In February 1941, non-Jewish Dutch citizens staged a strike in protest that was quickly crushed. From July 1942, over 107,000 Dutch Jews were deported; only 5,000 survived the war. Most were sent to Auschwitz; the first transport of 1,135 Jews left Holland for Auschwitz on 15 July 1942. Between 2 March and 20 July 1943, 34,313 Jews were sent in 19 transports to the Sobibór extermination camp, where all but 18 are thought to have been gassed on arrival.