Across
- 4. Western Europe where the fighting was fought
- 6. British Empire, Russia, France and more
- 8. Tunnels that the war was fought in
- 9. Another wood for troops
Down
- 1. German Submarines
- 2. A very powerful boat
- 3. Large, Heavy guns used for land warfare
- 5. Army used for naval warfare
- 7. An agreement between both sides to stop the war