World War I, [b] or the First World War (28 July 1914 – 11 November 1918), also known as The Great War, was a global conflict between two coalitions: the Allies (or Entente) and the Central Powers.

Mar 28, 2026 · World War I (1914–18) was an international conflict that embroiled most of the nations of Europe along with Russia, the U.S., the Middle East, and other regions. It led to the fall of four great …

Oct 29, 2009 · World War I, also known as the Great War, started in 1914 after the assassination of Archduke Franz Ferdinand of Austria. His murder escalated into a war across Europe that lasted until …

The National WWI Museum and Memorial is America's leading institution dedicated to remembering, interpreting and understanding the Great War and its enduring impact on the global community.

The formal Treaty of Versailles was signed on June 28, 1919, but the US Senate refused to ratify the treaty. The United States suffered 53,402 battle deaths in World War I, in less than six months of …

Aug 23, 2022 · Begin your research with these World War I overview guides and resources from the National Archives. The records highlighted here represent a small portion of the National Archives …

Experience the history of World War I with this interactive timeline. View maps, watch videos, see photos and read about the events that shaped the war. Open the interactive timeline […]

For many who served during World War I, keeping a diary offered an outlet, a place into which they could unload their fears and frustrations. Today, these diaries stand as unparalleled historic …

List of nations involved in World War I, including a brief description of the opposing factions during the conflict.

World War I summary: The war resulted in a dramatically changed geopolitical landscape, including the destruction of three empires: Austro-Hungarian, Ottoman and Russian.