Answer:
The Black Hills were a hunting ground and sacred territory of the Western Sioux Indians. At least portions of the region were also sacred to other Native American peoples—including the Cheyenne, Kiowa, and Arapaho—and the area had also been inhabited by the Crow. Rights to the region were guaranteed to Sioux and Arapaho by the Second Treaty of Fort Laramie in 1868. However, after a U.S. military expedition under George A. Custer discovered gold in the Black Hills in 1874, thousands of white gold hunters and miners swarmed into the area the following year. Native American resistance to that influx led to the Black Hills War (1876), the high point of which was the Battle of the Little Bighorn. Despite that Native American victory, the U.S. government was able to force the Sioux to relinquish their treaty rights to the Black Hills in 1877, by which time the Homestake Mine had become the largest gold mine in the United States.
Besides the old mining town of Deadwood and the Mount Rushmore National Memorial, the Black Hills’ tourist attractions include Jewel Cave National Monument, Wind Cave National Park, and Custer State Park, all in South Dakota. Devil’s Tower National Monument is located in Wyoming.