The 
  First Step
  
  In September 1939, the Nazis devised a plan to round 
  up the Jews of Poland and relocate them into areas known as ghettos.
  
  Walls and fences were erected around most ghetto areas. The Nazis operated a 
  policy of overcrowding, starvation and degradation. The reason why they did 
  this is still unclear, but it is known that they had a final aim, 
  which may have been either the deportation or the mass murder of the Jews.
  
  A 
  council of Jewish elders was appointed to run each ghetto. The council was responsible 
  for food distribution, welfare and the application of Nazi law to the ghetto 
  population. They also had to select people suitable to work and, eventually, 
  to assist in deporting Jews.