Ancestry.com. Colorado, Soldiers in WWI, 1917-1918 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2001.Original data: Roster of Men and Women Who Served in the World War from Colorado, 1917-18. Colorado, USA: Adjutant General, Colorado National Guard, 1941.
This book lists the names of more than 43,000 Colorado men and women who served in the military during World War I. The names are listed alphabetically and separated into sections by county, with the post office listed for the place where the person lived. The database gives each person's name, rank, and Armed Forces branch or organization.