Across
- 3. Woodrow Wilson was the _____________ of United States during the First World War.
- 4. A murder of this prince started the First World War.
- 5. Another name to First World War.
- 7. A country that belonged in an alliance called Central Powers.
- 9. Country that joined the Allies in 1917.
- 10. Germany used these vessels in the First World War.
Down
- 1. Germans attempt to cooperate with Mexico.
- 2. The civilian population or the civilian activities of a country at war.
- 6. A certain gas that was used as a weapon in the First World War.
- 8. A country that was the first to attack in the First World War