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 unusually large numbers of Native Americans, Crook held the field at the end of the battle but felt compelled by his losses to pull back, regroup, and wait for reinforcements. Unaware of Crook's battle, Gibbon and Terry proceeded, joining forces in early June near the mouth of Rosebud Creek. They reviewed Terry's plan calling for Custer's regiment to proceed south along the Rosebud while Terry and Gibbon's united forces would move in a westerly direction toward the Bighorn and Little Bighorn rivers. As this was the likely location of native encampments, all army elements had been instructed to converge there