World War I: Home

Library of Congress

Khan Academy

The United States World War I Centennial Commission

Imperial War Museums

The National Archives

Scroll down for many excellent articles

Primary Sources
Internet History Sourcebooks. Fordham University.
World War I
The Path to War
Ottoman Empire: Weakness
The Balkans: Conflict
Austria Hungary
German Arms Race
The Alliance System
The War
Diplomatic History
Military History
Personal Accounts
Resistence to War
Literary Responses
The Aftermath

Library of Congress

Brigham Young University

AlphaHistory

BBC

The British Library