Bighorn River Wind River Canyon near the town of Thermopolis. From there, the river flows through the Bighorn Basin in north central Wyoming, passing through Thermopolis and Hot Springs State Park. At the border with Montana, the river turns northeast, and flows past the north end of the Bighorn Mountains, through the Crow Indian Reservation, where the Yellowtail Dam forms the Bighorn Lake reservoir. The reservoir and the surrounding canyon are part of the Bighorn Canyon National Recreation Area. The Little Bighorn River joins the Bighorn near the town of Hardin, Montana. Approximately fifty miles farther downriver, the Bighorn River ends where
Battle of the Little Bighorn of Inquiry in 1879 conflicts with the archaeological evidence collected at the battlefield. Field data showed that possible extractor failures occurred at a rate of approximately 1:30 firings at the Custer Battlefield and at a rate of 1:37 at the Reno-Benteen Battlefield. Historian Thom Hatch observes that the Model 1873 Springfield, despite the known ejector flaw, remained the standard issue shoulder arm for US troops until the early 1890s. when the copper-cased, inside-primed cartridges were replaced with brass. Soldiers under Custer's direct command were annihilated on the first day of the battle (except for three Crow scouts and several troopers