Across
- 4. The last name of the assassinated Arch Duke
- 7. Gas weapon used to burn the lung of those in the trenches
- 8. Large metal vehicles that changed trench warfare
- 10. Taking to the skies these were now weapons of war
- 11. Germany, Austria-Hungary, and the Ottomans
Down
- 1. The assassins who started the war were from here
- 2. Britain, France and Russia
- 3. A battle between French and German forces, claimed 300,000 lives
- 5. The area in between two fronts of a battlefield
- 6. A failed invasion by Britain into the Ottoman Empire
- 8. The dug out lines, where soldiers spent their time defending
- 9. Battle between the British and the Germans, the first day climaed 57,000 lives