Among the many battles and skirmishes of the war was the Battle of the Little Bighorn, often known as Custer's Last Stand, the most storied of the many encounters between the U.S. army and mounted Plains Indians. That Indian victory notwithstanding, the U.S. leveraged national resources to force the Indians to surrender, primarily by attacking and destroying their encampments and property. The Great Sioux War took place under the presidencies of Ulysses S. Grant and Rutherford B. Hayes. The Agreement of 1877 (19 Stat. 254, enacted February 28, 1877) officially annexed Sioux land and permanently established Indian reservations.