World War I Several terms redirect here. For other uses, see WWI (disambiguation), The First World War (disambiguation), World War One (disambiguation), and Great War (disambiguation).

Nov 9, 2025 · WWI soldiers' messages in a bottle found on Australian beach more than 100 years later • Oct. 29, 2025, 7:59 AM ET (AP)

Oct 29, 2009 · French soldiers in Verdun endure the horrors of trench warfare, a strategy that led to rampant disease, shell shock and mass casualties during WWI.

The Library of Congress is uniquely prepared to tell the story of the United States' participation in the Great War. The Library’s unparalleled collections include posters, recordings, newspapers, …

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 …

Jul 18, 2019 · When did it end? This page provides a brief summary of the important events and battles of the war, from the start of the conflict through the peace treaties. To learn more, …

2 days ago · Non-lethal tear gas (lachrymatory) was experimented with in the early part of WWI, but the first major assault using deadly poison gas was undertaken by the German Army …

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

National WWI Museum and Memorial Grounds Memorial Fountain South Memorial Fountains North Soon after World War I ended, Kansas City leaders formed the Liberty Memorial …

WWI Inventions, From Pilates to Zippers, That We Still Use Today These World War I inventions made life easier during—and after—the war.