Most of the Galvanized Yankees sent west served in the 1st - 6th United States Volunteer Infantry. I don't subscribe to Fold3 but the name Jesse Sutton popped up there in a google search. I could make out that individual served in Company G, 3rd United States Volunteer Infantry. The 3rd US served in the Colorado and Nebraska Territories during the 1865 Colorado War that followed the Sand Creek Massacre (November 29, 1864). Company G appears to have been assigned to Fort Sedgwick, Julesburg, Colorado Territory. As
@redbob noted above Dee Brown's
The Galvanized Yankees is an excellent resource.