World War I saw the introduction of trench warfare on a large scale. Faced with the lethality of modern weapons, such as machine guns and artillery, opposing armies resorted to digging extensive networks of trenches along the Western Front. These trenches provided soldiers with some protection from enemy fire and created a static front line that defined much of the war. The grueling conditions in the trenches led to immense suffering, psychological trauma, and significant casualties, illustrating the horrors of industrialized warfare and changing military tactics for future conflicts.