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 from Fort Fetterman in the Wyoming Territory on May 29, marching toward the Powder River area. Brig. Gen. Alfred Terry's column, including twelve companies (A, B, C, D, E, F, G, H, I, K, L, and M) of the 7th Cavalry under Lt. Col. George Armstrong Custer's immediate command, Companies C and G of the 17th U.S. Infantry, and the Gatling gun detachment of the 20th Infantry departed westward from Fort Abraham Lincoln in the Dakota Territory on May 17. They were accompanied by teamsters and packers with 150 wagons and a large contingent of pack mules that reinforced Custer.