The "Great War" from the trusted documentary leader PBS.  This site includes topical coverage of the war with commentary from leading authors about the war.

BBC coverage of World War One.  Sections that include: Descent into War, Battles, the Human Experience of War, and the Trenches: Virtual Tours.

History.com's coverage of World War I includes videos, photos, and more.

1914-1918-Online , an International Encyclopedia of the First World War, is an English-language open-access reference to the war.  

Encyclopedia Britannica has a Remembering World War I feature.

Go to the "Websites" tab on this guide to browse additional credible internet sources.

The Oxford Dictionary of National Biography has free articles about the lives of soldiers and civilians, men and women, famous and little-known, who were part of the events.

Use these online reference databases when you begin searching for information on your topic to provide you background information and a foundation from which to begin your research.  

Think of this step as a "pre-search" before you begin your "real" research.  

Resources covering the First World War are located in the

D 501-680 range.

For most topics, it's a good idea to use and cite scholarly works rather than Wikipedia. 

Visit McQuade's "Wikipedia: Researchers Beware" page for more information.