US National Archives
Nara: Military Resources World War I
A compilation of resources on World War I from the National Archives and Records Administration, including links to external sites.
Other
In Their Words: The Meuse Argonne: A Decisive Battle
Read this overview of what became known as the Meuse-Argonne Campaign, the last major battle of World War I. Included is a section with personal accounts of soldiers involved in the campaign, and pictures of artifacts related to the battle.
Library of Congress
Loc: A Guide to World War I Materials
A web guide of links to World War I resources throughout the Library of Congress web site and beyond.