World War II

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Across
  1. 2. prisoner of war
  2. 5. a german submarine
  3. 6. bullets and shells fired from weapons
  4. 7. an appalling, evil act
  5. 9. spying
  6. 12. a small bomb that is hurled by hand
Down
  1. 1. able to move on both land and water
  2. 3. give up control
  3. 4. an underground bom shelter
  4. 8. a secret code that substitutes letter or symbols
  5. 10. foot soldier
  6. 11. a formal agreement between nations