Trench warfare was prominent during World War One and the trenches along the Western Front were witness to some of the bloodiest battles in human history. It has been suggested that trench warfare arose due to a rapid advance in firepower not being matched by advances in troop mobility, resulting in both sides digging elaborate trench systems facing each other along a front.
Approximately 10% of soldiers that fought in the trenches during World War One were killed. Medicine and hygiene was poor so many minor injuries resulted in death due to infection. American forces reported that 44% of casualties that developed gangrene died.