For the next half-year, beginning 28 November 1940, Police Battalion 101 guarded the new ghetto in Łódź, eventually crammed with 160,000 Jews.[24] The Łódź Ghetto was the second-largest Jewish ghetto of World War II after the Warsaw Ghetto where the policemen from Battalion 61 held victory parties on the days when a large number of desperate prisoners were shot at the ghetto fence.[25] Battalion 101, commanded by career policeman Major Wilhelm Trapp,[26] returned to Hamburg in May 1941 and again the more experienced servicemen were dispatched to organize more units.