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Events on Sunday 30 August 1874 1
1874Custer's Black Hills Expedition confirms goldMilitary expedition finds gold on Lakota treaty landAn expedition led by Lieutenant Colonel George Armstrong Custer explored the Black Hills of Dakota Territory, land guaranteed to the Lakota Sioux by treaty. Expedition geologists confirmed the presence of gold, and news of the find triggered a rush of prospectors into Sioux territory. The resulting treaty violations were a major cause of the Great Sioux War of 1876.