ww2 terms and clues

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Across
  1. 4. Great Britain, U.S, Soviet Union
  2. 5. How many Jews died from the Holocaust?
  3. 6. when did the holocaust start
Down
  1. 1. Who invaded Poland?
  2. 2. Germany, Italy, Japan
  3. 3. One of the worst events to happen in WW2.