The First World War is a significant event in world history, also referred to as the Great War. Other synonyms for this war include the War to End All Wars and the European War. The conflict lasted from 1914 to 1918, and it involved many of the world's major powers. It is often characterized by trench warfare, new technological advancements in weaponry, and the mobilization of millions of soldiers. While the war primarily took place in Europe, it had a profound impact on the rest of the world and laid the groundwork for the Second World War. The First World War remains a critical event that shaped the modern world.