I believe that the most fitting answer for this question would be that the Crusades were called to fight against the Muslims. In 1095, the Pope claimed that Muslims were destroying the Holy Land and called on European Christians to put an end to it. They sought to regain control over Jerusalem.
No they did not china is very strick with everything.
Soldiers also made dugouts and funk holes in the side of the trenches to give them some protection from the weather and enemy fire. The front-line trenches were also protected by barbed-wire entanglements and machine-gun posts. Short trenches called saps were dug from the front-trench into No-Man's Land.
