In 1874, gold was discovered in the Black Hills during a military expedition led by George A. Custer and miners and explorers began illegally entering land promised to the Lakota. Custer's expedition took place despite the fact that the Sioux had been granted the entire western half of present-day South Dakota (West River) in 1868 by the Treaty of Laramie as part of the Great Sioux Reservation. The Sioux declined to grant mining rights or land in the Black Hills, and war broke out after the U.S. failed to stop white miners and settlers from entering the region. Eventually the U.S. won and broke up the Great Sioux Reservation into five reservations, settling the Lakota there. In 1980 the Supreme Court and Congress ordered compensation but the Lakota still refuse to accept it, insisting on return of their land.