Across
- 3. first name of archduke who was assassinated
- 5. This country got put with the blame for WWI
- 7. This type of weapon was used in WWI
- 10. one of the causes of WWI
- 12. This type of warfare was used in WWI
- 15. Country that issued ultimatum
- 16. The name of the area between trenches
- 18. This empire was dissolved at the end of the war
- 19. This country had to leave in 1917
Down
- 1. Country who refused to answer ultimatum
- 2. This neutral country was invaded by Germany
- 4. Country that fought on the western front
- 6. This plan was designed to avoid fighting on two fronts
- 8. Holiday where there was a temporary truce
- 9. Prompted US entry in WWI
- 11. This caused all of the world to be involved in WWI
- 13. this president involved the US in WWI
- 14. Country that fought on the western front
- 17. this country tried to stay isolated