^ 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 …

Feb 8, 2026 · Heroic U.S. Army "Hello Girls" of World War I to be honored at Colma cemetery • Feb. 6, 2026, 9:26 PM ET (CBS) WWI Indian soldiers honoured with special tribute in Bournemouth • Feb. 2, …

Oct 29, 2009 · WWI was one of the deadliest conflicts in human history, with total casualties estimated at over 16 million.

Library of Congress image In the summer of 1914, the assassination of Archduke Franz Ferdinand, heir to the Austro-Hungarian Empire, ignited a continental war between the Central Powers of Germany, …

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

World War I began in June of 1914, and is considered to have five major causes that led to the outbreak of the war. These five causes include the four long-term causes (militarism, alliances, imperialism …

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

Though the assassination of Archduke Ferdinand was the direct precipitating event leading to the declaration of war, there were many other factors that also played a role in leading up to World War I …

4 days ago · German Grave, WWI D. McLellan - Imperial War Museums (CC BY-NC-SA) The reasons Germany lost WWI include: Germany's allies were much weaker militarily than those on the opposing …

May 1, 2025 · A guide to the causes of World War One, why each of the major belligerents became involved, and what they wanted from it.