History of Montana degree of longitude northward to the boundary line of the British possessions. The boundaries of Montana territory did not change during its existence. Montana was admitted to the Union as the state of Montana on November 8, 1889. The Battle of the Little Bighorn—also called Custer's Last Stand and the Battle of the Greasy Grass—was an armed engagement between a Lakota (Sioux)-Northern Cheyenne-Arapaho combined force and the 7th Cavalry of the United States Army. It occurred June 25–June 26, 1876, near the Little Bighorn River in eastern Montana Territory near present-day Hardin, Montana, on land that today is part of
Battle of the Little Bighorn Indian reservations. The Battle of the Little Bighorn was the subject of an 1879 U.S. Army Court of Inquiry in Chicago, held at Reno's request, during which his conduct was scrutinized. Some testimony by non-Army officers suggested that he was drunk and a coward. The court found Reno's conduct to be without fault. After the battle, Thomas Rosser, James O'Kelly, and others continued to question the conduct of Reno due to his hastily ordered retreat. Defenders of Reno at the trial noted that, while the retreat was disorganized, Reno did not withdraw from his position until it became apparent that