Great Sioux War of 1876 Col. George Armstrong Custer and the Seventh Cavalry were ordered out from the main Dakota Column to scout the Rosebud and Big Horn river valleys. On June 25, 1876, they encountered a large village on the west bank of the Little Bighorn. The US troops were seriously beaten in the Battle of the Little Bighorn and nearly 270 men were killed, including Custer. Custer split his forces just prior to the battle and his immediate command of five cavalry companies was annihilated without any survivors. Two days later, a combined force consisting of Colonel Gibbon's column, along with Terry's headquarters
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