 However, some remained and formed militia groups in Fairplay, Leadville, Denver and Mace's Hole (present day Beulah).These Confederate Partisan Ranger units operated in the Colorado Territory from 1861 to 1865, raiding supply wagon trains, disrupting communications lines, recruiting volunteers, and skirmishing with Union troops.There were also pockets of strong support for the Confederacy in the mining areas and in the Arkansas River Valley, from Cañon City eastward to Lamar, and Cañon City southward to Trinidad.