What materials were used for building trenches in world war 1?
However, the German trenches were usually more substantial than that of the Allied forces. This is because they were fighting a defensive war, and their front line did not alter much. Their trenches were deep, and often had connecting “cellars” very strongly made of concrete for their own troops to shelter in while the allied artillery blasted empty trenches; the Germans thus re-emerged unscathed when the bombardment was lifted.
