Battle of the Rosebud on the reservation by January 31, 1876 to negotiate the sale. A few bands did not comply and when the deadline of January 31 passed the US undertook to force Sitting Bull, Crazy Horse, and their followers onto the reservation. The first military expedition against the recalcitrant Indians in March 1876 was a failure, ending in the Battle of Powder River. In June 1876, the US military renewed the fight with a three-pronged invasion of the Bighorn and Powder river country. Colonel John Gibbon led a force from the west; General Alfred Terry (with Lieutenant Colonel George Armstrong Custer) came
Battle of the Little Bighorn break back to the south where Reno and Benteen could have provided assistance. Two men from the 7th Cavalry, the young Crow scout "Ashishishe" (known in English as Curley) and the trooper Peter Thompson, claimed to have seen Custer engage the Indians. The accuracy of their recollections remains controversial; accounts by battle participants and assessments by historians almost universally discredit Thompson's claim. Archaeological evidence and reassessment of Indian testimony has led to a new interpretation of the battle. In the 1920s, battlefield investigators discovered hundreds of .45–55 shell cases along the ridge line known today as Nye-Cartwright Ridge, between South