World History Maps Interactive Historical Atlas of the Civil War, detail page for:

Colorado, Territory Feb 28, 1861 - after Jun 25, 1865

Colorado Territory organized, Feb 28, 1861
US Dept. of the West reorganized as Western Dept. including Iowa Minnesota Kansas Nebraska Colorado and Dakota Missouri and Illinois transferred from Dept. of the Ohio Dept. of New Mexico discontinued and absorbed, Jul 3, 1861
William Gilpin US Governor, Jul 8, 1861 - May 16, 1862
US Dept. of Kansas created Kansas Nebraska Colorado and Dakota transferred from Western Dept., Nov 9, 1861

US Dept. of Kansas recreated Kansas Nebraska and Colorado Transferred from Dept. of the Mississippi, May 2, 1862
John Evans US Governor, May 16, 1862 - after Jun 25, 1865
Nebraska transferred from US Dept. of the Northwest to Dept. of The Missouri Colorado included in Dept. of the Missouri, Oct 11, 1862

US Dept. of Kansas recreated Kansas Nebraska and Colorado Transferred from Dept. of the Missouri, Jan 1, 1864
Sand Creek Campaign, Nov 5, 1864 - Nov 14, 1864
Sand Creek, battle, Nov 29, 1864 - Nov 30, 1864