World wars (1 2)

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Across
  1. 4. . The first city occupied by Germany at the beginning of World War I.
  2. 5. . The German strategic failure caused by fighting a prolonged war on multiple fronts.
  3. 7. . The 1917 political upheaval that led to Russia’s withdrawal from World War I.
  4. 8. . The treaty that officially ended World War I in 1919.
  5. 10. . The Allied policy of conceding territory to avoid conflict before World War II.
Down
  1. 1. . The Allied military strategy that prioritized the defeat of Germany before Japan.
  2. 2. . The codename for Germany’s 1941 invasion of the Soviet Union.
  3. 3. Project 5. The secret project that developed the first atomic bomb during World War II.
  4. 6. . The economic and industrial program that significantly strengthened the U.S. war effort after 1941.
  5. 9. . The country that was invaded by Germany to reach France.