The 7th US Cavalry under General George Armstrong Custer leaves Fort Lincoln that would end at the Battle of Little Bighorn.
The 7th Calvary (700 troopers and Native Scouts) entered Montana and Dakota Territory and made contact with Indians the next day on June 23, 1876. On June 24, Custer's Arikara and Osage scouts identified a party of Sioux shadowing their movements. According to the scouts, the Sioux party retreated. That night, Custer gave his plans to attack the Sioux party the next day. Not knowing combined forces were the Lakota Sioux, Northern Cheyenne, and Arapaho, Custer miscalculated the size of the party for the attack. The regiment was defeated and Lieutenant Colonel George Armstrong Custer was killed.