French using catapults, where the trenches were close together, using lengths of steel springs or even resilient tree branches as propellants, grenades often empty jam-pots refiled with explosive and fused. 1915
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Image Number: 4220-20431916Rights ManagedCredit Line:Illustrated London News Ltd/Mary Evans Picture Library/Pantheon/SuperStockCollection:Mary Evans Picture Library Contributor:Illustrated London News Ltd Model Release:NoProperty Release:NoResolution:5987×4156
