References:
Dyer's Compendium of the War of the Rebellion, 1908 Edition

1st REGIMENT INFANTRY.

Organized at Camp Weld, near Denver, August 26 to December 14, 1861. 3 Companies sent to Fort Wise, afterwards Fort Lyon, and duty there till March, 1862, when marched from Fort Lyon to Fort Union, N. Mex., March 3-10, and rejoin Regiment. Regiment left Camp Weld February 22 and march to Fort Union, N. Mex. At Fort Union March 10-22. March toward Santa Fe, N. Mex. Actions at Apache Canon March 26. La Glorietta Pass, or Pigeon Ranch, March 28. Peralta April 15. At Fort Craig till July. Garrison at Fort Garland, Fort Union, Fort Craig, Fort Larned and Fort Lyon, Colo., till November. Designation changed to 1st Colorado Cavalry November 1, 1862, which see.

2nd REGIMENT INFANTRY.

Organized at Fort Garland, Canon City, Fort Lyon and Denver, Colo., December, 1861. Ford's Independent Company, organized at Canon City, Colo., August to December, 1861, assigned as Company "A." Company left Canon City December 12 and arrived at Fort Garland December 21, and mustered in December 24, 1861. Todd's Independent Company organized at Canon City August to December, 1861. Assigned as Company "B." Left Canon City December 7 and marched to Fort Garland. Mustered in December 14, 1861. Ford's Company at Fort Garland till February 4, 1862, then marched to Santa Fe, N. Mex., February 4-March 4, 1862, thence to Fort Union, N. Mex., March 5-11. Dodd's Company marched to Santa Fe, N. Mex., thence to Fort Craig and Joined Canby. Skirmish at Fort Craig February 20 (Co. "B"). Engagement at Valverde February 21 (Co. "B"). Evacuation of Albuquerque and Santa Fe March 3-4. Skirmish at Albuquerque April 8. Action at Apache Canon March 26. La Glorietta Pass, or Pigeon Ranch, March 28. Peralta April 15. Apache Canon July 15. Duty at Fort Craig, Santa Fe and Fort Union till February, 1863. Expedition from Fort Union to Canadian River and Utah Creek October 29-November 23 (Co "C"). March to Fort Lyon, Colo. Duty there, at Denver and Fort Garland till March. Ordered to Camp Scott, Kansas. At Camp Leroy, Kansas, June. Fort Gibson, I. T., May 28. (Co. "C" at Council Grove, Kansas District of the Border, July, 1863.) Escort train from Fort Scott to Fort Smith, Ark., June-July (Cos. "A," "B.") Engagement at Cabin Creek, I. T., July 1-2, and at Elk Creek near Honey Springs, I. T., July 17. Duty in Cherokee Nation at Fort Blunt July, and at Fort Smith, Ark., operating on line of the Arkansas River till November. Action at Perryville, I. T., August 26. Texas Prairie August 29 (Co. "F"). Skirmish at Webber Falls September 9. Ordered to Springfield, Mo., October, 1863, for consolidation with 3rd Colorado Infantry to form 2nd Colorado Cavalry, which see.

3RD REGIMENT INFANTRY.

Organized at Denver and Camp Weld, Colorado, September, 1862, to January, 1863. Attached to District of Colorado to March, 1863. District of Southeast Missouri, Department of Missouri, to October, 1863.

SERVICE.--March from Camp Weld, Denver, Colo., to Fort Leavenworth, Kansas, March 5-April 24, thence moved to St. Louis, Mo., via St. Jo and Hannibal, Mo., April 28-30. Ordered to Sulphur Springs, Mo., thence to Pilot Knob, Mo. Duty at Pilot Knob, Potosi and Ironton till October, 1863. Moved to St. Louis October, 1863, for consolidation with 2nd Colorado Infantry to form 2nd Colorado Cavalry, which see.

DENVER CITY HOME GUARD.

Organized at Denver August to October, 1861. Attached to District of Colorado. March from Denver to New Mexico January, 1862. Engagement at Valverde, N. Mex., February 21, 1862. Mustered out April 1, 1862.