World War I

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Across
  1. 2. an archduke of Austria
  2. 3. a union between people, groups, or countries
  3. 5. a psychological condition resulting from stress, and today it is known as PTSD
  4. 6. a secret Serbian society involved in the plan to assassinate Archduke Franz Ferdinand
  5. 8. the belief that a country should be stronger by using military power
  6. 10. an alliance between Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria
Down
  1. 1. a peaceful treaty made to end World War I between Germany and the Allied Nations
  2. 4. an alliance between Great Britain, France, and Russia
  3. 7. place where Arc,hduke Franz Ferdinand was from
  4. 9. a type of warfare in which soldiers defend and attack from positions dug into the ground