After the Battle if the Marine in September in 1914 the German army was forced to retreat. Rather than give up the territory the Germans dug in to protect themselves from the guns and the advancing allies. Soon, the allies followed the Germans in building the trenches. The trench lines spread from the North Sea to Switzerland.
The trenches in both sides were protected by lined barbed wire with open land in between. All the explosions quickly turned the land into a sea of mud and craters. Machine guns were so efficient few attacks on the trenches were successful. …
