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Subject
- Battlefields[remove]66
- World War (1914-1918)63
- Soldiers38
- Trenches21
- Artillery20
- Intrenchments20
- Transportation, Military10
- Fortification9
- Military weapons9
- Battles8
- War casualties8
- War--Medical aspects8
- War--Relief of sick and wounded8
- Buildings--War damage7
- Animals--War use4
- Armored vehicles, Military3
- Bombardment3
- Buildings--Blast effects3
- Canada. Canadian Army3
- Cities and towns3