Across
- 4. Long ditch dug in the ground
- 6. Military observation of a region to locate an enemy or their strategic features
- 7. Used by both sides to clear trenches
- 9. Created chemical burns on contact, blisters oozing yellow fluid, blindness
- 10. Helped break the stalemate of trench warfare
Down
- 1. Difficult to detect
- 2. Aerial battles
- 3. 1st widespread use of rapid fire, spewed 400-500 rounds/minutes
- 5. Lungs filled with fluid
- 8. Area between 2 opposing trenches