In early 1864, the 1st Colorado Veteran Volunteers initiated what became known as the Colorado War by attacking Cheyenne Indians at Fremont's Orchard. This engagement occurred in a context where the 1st Colorado Cavalry Regiment had been formed in November 1862 under Territorial Governor John Evans and Colonel John Chivington to protect Colorado against both Confederate incursions and Native American resistance to American expansion in the territory. The regiment, composed mostly of members of the 1st Colorado Infantry Regiment and companies from the 2nd Colorado Infantry Regiment, had already seen significant action against Confederate forces at the Battle of Glorieta Pass in New Mexico Territory earlier in 1862.
The attack at Fremont's Orchard marked a turning point in Colorado territorial history, as it initiated direct military conflict between the 1st Colorado Veteran Volunteers and the Cheyenne Indians. The assault prompted retaliatory actions by the Cheyenne, which escalated tensions throughout the region and disrupted civilian commerce and movement.
The consequences of this engagement were immediate and severe. The resulting hostilities and Indian retaliations brought traffic on the wagon trails into Denver to a standstill, creating a crisis in the territorial economy and supply lines. This conflict marked the beginning of sustained military operations against Native Americans in Colorado and set the stage for further confrontations between American forces and indigenous peoples in the region.
The Indian Wars encompass more than three centuries of armed conflict between the United States government, American settlers, and Indigenous nations — from the Powhatan Wars of the 1620s through the final Plains campaigns of the late 19th century. The eastern conflicts — King Philip's War (1675–1676), the Tuscarora War (1711–1715), and the Creek and Seminole Wars — largely ended organized Indigenous resistance east of the Mississippi by the 1840s. On the Great Plains, the Sioux Wars (1854–1890), Red River War (1874–1875), and Nez Perce War (1877) followed the displacement wrought by the transcontinental railroad and the near-extinction of the American bison — an estimated 30 to 60 million animals reduced to fewer than 1,000 by 1890. The Ghost Dance religious movement and the massacre at Wounded Knee (December 29, 1890), in which US cavalry killed approximately 250 Lakota men, women, and children, marked the effective end of armed resistance. The Dawes Act (1887) allotted reservation land to individual families, opening millions of acres to white settlement and reducing Indigenous landholdings by about two-thirds over the following decades.
4 soldiers killed, 6 wounded; Cheyenne losses unknown
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