World War I

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