Cheyenne WWI Veterans List
Civil War Rosters - Colorado
Colorado Civil War Pension Applications a part of the USGenWeb Archives Pensions Project
Colorado Civil War Casualties Index compiled from the Civil War Service Record Index Cards on file at the Colorado State Archives. The information on the cards was probably extracted from the Colorado Volunteers Transcript of Record for the Civil War a number of years ago. The names listed are for those who lost their lives while serving with the Colorado Volunteers.
Colorado Veterans' Grave Registrations 1862-1949 (Colorado State Archives)
Colorado Volunteers in the New Mexico Campaign 1862 (Colorado State Archives)
Colorado Volunteers in the Spanish American War (1898)
Colorado Volunteers Transcript of Record Index (1861-1865) includes name of the enlistee, his company, regiment, and rank  (Colorado State Archives)
Korean Conflict Casualty List
Vietnam Conflict Casualty List
Vietnam War Casualties - June-December 1966 & January-December 1968   (Colorado State Archives)
WWI Civilian Service Questionnaires -  (1917-1922)   (Colorado State Archives) Information found on these questionnaires may include: name; city and county of residence; detail of service of any kind in aid of the war; names of organizations and offices held in aid of war; nature of duties performed; drives participated in; names of others who did notable civilian war work; and date of record.
WW1 Draft Registration Cards 1917-1918 In 1917 and 1918, approximately 24 million men living in the US completed a World War I draft registration card. These registration cards represent approximately 98% of the men under the age of 46
World War II Army Casualties: Colorado
World War II Navy Casualties: Colorado

Additional Resources

Colorado Obituaries enter your Colorado ancestor's name to instantly search the world's largest newspaper archive; over 12 million newspaper pages
Colorado Birth Records
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Colorado Death Records