^ Including 2,000,000 German soldiers, at least 1,000,000 Austro-Hungarians, 800,000 Ottoman troops[2] ^ Often abbreviated as WWI or WW1 ^ Only the Triple Alliance was a formal "alliance"; the …

Jan 12, 2000 · 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 · WWI was one of the deadliest conflicts in human history, with total casualties estimated at over 16 million.

WWI Categories WWI Essentials Learn the essentials about World War I and understand the key events and impacts of the war.

May 13, 2025 · World War I was sparked by the assassination of Archduke Franz Ferdinand in 1914. Find out what happened after that event in this WWI timeline.

Marines battling during the Meuse-Argonne Offensive, 1918. (USMC) The war fought between July 28, 1914, and November 11, 1918, was known at the time as the Great War, the War to End War, and …

Nov 30, 2025 · World War I started with the shot heard around the world: the assassination of Archduke Franz Ferdinand of Austria on July 28, 1914, in Sarajevo. By 1918, more than 9 million people had …

Explore the comprehensive, peer-reviewed "1914-1918-online" encyclopedia. Access 1,600+ articles on WWI from global experts.

World War I (WWI or WW1), also called the First World War, or the Great War, began on 28 July 1914 and lasted until 11 November 1918. It was a global conflict and lasted exactly 4 years, 3 months and …

U.S. Entry into World War I, 1917 On April 2, 1917, President Woodrow Wilson went before a joint session of Congress to request a declaration of war against Germany. Wilson cited Germany’s …