Two military posts were built a few miles apart during the Indian Wars near the strategic Bozeman Trail crossing of Powder River—Fort Reno in the 1860s and Cantonment Reno in the 1870s. The first was one of three forts whose existence provoked the tribes into war. The second was an important Army base for later campaigns.
On Aug. 29, 1865, troops under Brig. Gen. Patrick E. Connor attacked an Arapaho village near present Ranchester, Wyo. Connor’s detachment was part of a large expedition ordered to subjugate the warring Cheyenne, Sioux and Arapaho in the Powder River Basin. Overall success was mixed. Connor was relieved of his command.
The Connor Battlefield is a park on Tongue River in Ranchester, Wyo., marking the spot where Brig. Gen. Patrick Connor and about 475 U.S. troops and Pawnee scouts in August 1865 attacked a village of 500 Arapaho under the leadership of Black Bear and Old David. The Arapaho suffered 33 killed, and the troops burned their lodges and drove off most of the horse herd. Today the park offers picnic grounds, a campground and a monument to the event.