Most trenches consisted of three fire trenches and connected using communication trenches. As the use of trenches continued the trenches got more elaborate. With barbed wires and emplacements, often below ground level. By 1916, the German system of
defence had three or four such trench systems layered back over a distance of a couple of miles. By 1917, the system had deepened even further so that the assaults of 1918 faced defensive systems several miles deep.
defence had three or four such trench systems layered back over a distance of a couple of miles. By 1917, the system had deepened even further so that the assaults of 1918 faced defensive systems several miles deep.