The World Wide Web has numerous sources of information regarding World War I (also known as the Great War). Here are a few links. Each of these websites has additional links.

Guide to America's World War I Monuments
     http://www.pdcmilitarymemorials.com/ww1/

Archives Library Information Center, Military Resources: World War I
     http://www.archives.gov/research/alic/reference/military/ww1.html

World War I: Trenches on the Web
     http://www.worldwar1.com/

World War One Historical Association
     http://ww1ha.org/

The World War I Document Archive
     http://www.lib.byu.edu/~rdh/wwi/

The Great War (PBS)
     http://www.pbs.org/greatwar/