Seyss-Inquart was an anti-Semite: within a few months of his arrival in the Netherlands, he sacked Jews from government, the press and leading positions in industry. Anti-Jewish measures escalated after 1941: approximately 140,000 Jews were registered, a ghetto was created in Amsterdam and a transit camp set up at Westerbork. In February 1941, 600 Jews were sent to the Buchenwald and Mauthausen concentration camps. Later, Dutch Jews were sent to Auschwitz. As Allied forces approached in September 1944 the remaining Jews at Westerbork were sent to Theresienstadt. Of 140,000 registered Dutch Jews, only 44,500 survived the war.