World+War+I

=**Trench Warfare** = In 1914 artillery guns were now placed several miles -- more people were killed by the artillery fire than any other weapon during the World War I. To protect themselves they had to dig up trenches, troops dug a network that went across the English Channel to the Swiss border. So they could prevent the enemy from overrunning the trenches they had to come up with a new weapon "the machine gun". **No-man's-land** is when there's still space between the trenches, both sides of the trenches had to be barbed wire and have obstacle courses so no one would be able to cross.