Battle of Slim Buttes Battle of Slim Buttes The Battle of Slim Buttes was fought on September 9 and 10, 1876, in the Great Sioux Reservation in the Dakota Territory, between the United States Army and the Sioux. The Battle of Slim Buttes was the first U.S. Army victory of the Great Sioux War of 1876 after George Armstrong Custer's defeat at the Battle of Little Bighorn on June 25 and 26, 1876. Brigadier General George Crook, one of the U.S. Army's ablest Indian fighters, led the "Horsemeat March," one of the most grueling military expeditions in U.S. history, destroying Oglala Chief American Horse's
Great Sioux War of 1876 Ash Creek. Miles' continuous campaigning pushed a number of the Northern Cheyenne and Lakota to either surrender or slip across the border into Canada. Miles later commanded the US Army during the Spanish–American War. The Agreement of 1877 (, enacted February 28, 1877) officially took away Sioux land and permanently established Indian reservations. While military leaders began planning a spring campaign against the Lakota and Northern Cheyenne who had refused to come in, a number of diplomatic efforts were underway in an effort to end the war. After the defeat at the Battle of the Little Bighorn in June 1876,