The Territory of Colorado was an organized incorporated territory of the United States that existed from February 28, 1861, until August 1, 1876, when it was admitted to the Union as the State of Colorado.
Territorial evolution of Colorado - Wikipedia
History of Colorado - Wikipedia
Colorado Statehood and Territory
11 things you didn't know about Colorado's path to statehood | History Colorado
History of Colorado - Wikipedia
Colorado - Wikipedia
Colorado Territory | Articles | Colorado Encyclopedia
