Prior to the Second World War, Warsaw was the capital of Poland. The city had 1.3 million inhabitants, of which 380,567 were Jewish. This was the largest Jewish community in Europe at the time.
The Nazis occupied Warsaw on 29 September 1939, four weeks after invading Poland. The Jewish population in Warsaw had grown following orders from Heydrich to concentrate Jews in cities and towns, but a ghetto was not decreed until 12 October 1940.
The ghetto was segregated from the rest of the population by a wall and sealed on 15 November 1940. Jewish policemen guarded the inside of the wall, and Nazi and Polish officers patrolled the outside. Only those with special permits could leave the ghetto. Over 400,000 people were imprisoned. i think that’s it