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
Little Bighorn Battlefield National Monument the Sans Arc Lakota warrior Long Road and the Minniconjou Lakota Dog's Back Bone. On June 25, 2003, an "unknown Lakota warrior marker" was placed on Wooden Leg Hill, east of Last Stand Hill to honor a warrior who was killed during the battle, as witnessed and reported by the Northern Cheyenne warrior Wooden Leg. The battlefield is the final resting place of the western historian and author Stanley Vestal, a professor at the University of Oklahoma. Little Bighorn Battlefield National Monument Little Bighorn Battlefield National Monument preserves the site of the June 25 and 26, 1876, Battle of the