The significant global conflict that took place during the early 20th century was World War I, often referred to as "The Great War." It lasted from 1914 to 1918 and involved many of the world's great powers, primarily divided into two factions: the Allies and the Central Powers. The war was triggered by the assassination of Archduke Franz Ferdinand of Austria and resulted in unprecedented levels of destruction, loss of life, and geopolitical change. It also led to major advancements in military technology and tactics and set the stage for World War II due to unresolved tensions and repercussions from its aftermath.