Across
- 2. Serbian group who conducted terrorist attacks against Austrians in Bosnia
- 5. tactic of fighting in deep trenches
- 8. acronym used to describe four major causes of World War I
- 9. weapons that launch explosive shells
- 10. Nickname for American soldiers during World War I
Down
- 1. German for submarine
- 3. Russian Communist leader who came to power after the October Revolution
- 4. ____________Plan failed German plan to win the war
- 6. a punishment for starting a war
- 7. a truce or agreement to suspend fighting