A famous cause and effect event occurring in the Black Hills of the Dakota Territory was the Great Sioux war of 1876 following the discovery of gold in the region.
Claims were made of gold in the Black Hills region early in the 19th century. However, it wasn't until the middle of the century that gold was actually discovered in the region by Harney and Alex Engh.
Their expedition to find gold in the region was a success. This caused the migration of thousands of whites into the Black Hills region. Over time, tensions grew greatly between the whites and the Native Americans who had occupied the territory for generations, which would culminate in the Great Sioux war of 1876 and Custer's Last Stand.
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