World War 1 and World War 2

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Across
  1. 2. This war broke out in August 1914
  2. 4. The result of World War 1 and 2
  3. 8. The reason for World War 1
  4. 9. Sweetened hazelnut cocoa spread invented during World War 2
  5. 10. Japanese cities bombed during World War 2
  6. 11. The two major groups of countries that fought each other during World War 2
  7. 12. This war broke out in September 1939
Down
  1. 1. The two major groups of countries that fought each other during World War 1
  2. 3. The country invaded by Hitler in September 1939
  3. 5. World War 1 started here
  4. 6. Medical procedure invented because of World War1
  5. 7. This gas was used for the first time during World War 1