I want to know the answer to the following question:
What plan was implemented in September 1941?
All the background I'm provided with is that "Of the approximately 4,800 Jews who had lived in Hannover in 1938, fewer than 100 were still in the city when troops of the United States Army arrived on 10 April 1945 to occupy Hanover at the end of the war.[citation needed]". Is that enough to answer the question?