Many soldiers fighting in World War One at one point had to face trench foot. Trench foot is a fungal infection brought about by a prolonged exposure to wet, cold conditions like what there was in the trenches. It was first thought up by military authorities that soldiers that did not have very much morale got the fungal infection. If the trench foot turned gangrenous then the leg would have to be amputated. The officers tried to combat it by telling the soldiers that they had to dry their feet if they got wet and change socks multiple times a day.
German Machine Guns
The 1914 machine gun needed from 4 to 6 people to operate and was normally mounted onto a tripod. It could potentially fire from 400-600 bullets per minute