Across
- 4. Tanks make their big debut at this battle
- 8. A large aircraft and rock band
- 9. The boat that brought USA into WW1
- 11. The second battle here is the debut of a deadly gas
- 12. A Powerful New Class of Ship
Down
- 1. A very muddy battle in WW1
- 2. Canada's true air hero
- 3. The New Boss of Russia
- 5. The battle in which Canada becomes a Nation
- 6. Germany's colorful Ace
- 7. The Wolves of the Sea
- 10. A convenient building item in planes