The global conflict that saw the extensive use of trench warfare and lasted from 1914 to 1918 was World War I. Known as the Great War, it involved many of the world's great powers, divided into two main alliances: the Allies and the Central Powers. The war was characterized by horrifying trench conditions, where soldiers faced immense hardships such as disease, psychological trauma, and constant artillery bombardment. The conflict marked a significant turning point in history due to its unprecedented scale and the introduction of modern warfare technology, resulting in millions of casualties. It ultimately reshaped international relations, leading to major political and social changes across the globe.