I want to know the answer to the following question:
In what year did Hitler give the speech at Sportspalast?
All the background I'm provided with is that "On 4 September 1940, in a long address at the Sportspalast, Hitler declared: "And should the Royal Air Force drop two thousand, or three thousand [kilograms ...] then we will now drop [...] 300,000, 400,000, yes one million kilograms in a single night.". Is that enough to answer the question?
Answer: yes