World War I
Affects leading to stalemate
Trench warfare was great for defense but not offense, when both sides adopted trenches it became a stalemate. Due to advanced weapons when both sides had trenches if one side attempted to charge they would be mowed down by machine guns in a place known as no mans land.
Psychological effects on soldiers involved in trench warfare
Shell shock was the main effect of trench warfare to soldiers. Shell shock was a condition that was developed by many soldiers in the trenches in World War I. Shell shock was caused by the constant bombarding of shells. Throughout the World War I shell shock was undefined, soldiers suffering with it were treated as cowards. It was not until after World War I that doctors were able to determine what it was. Shell shock was later defined as PTSD (post-traumatic stress disorder). Another effect was trench foot, when the soldiers stood knee deep in blood, mud, and other excrement.
Mustard gas and Chlorine gas were a big problem for soldiers in the trenches. Mustard gas burns the skin, eyes, nose and throat when released. Chlorine gas eats a persons organs, attacking especially the lungs. These gases were a terrible surprise in the trenches, because the men were stuck in the trenches and couldn't escape fast enough.