The Northern Cheyenne Tribe v. Hollowbreast case was decided by the U.S. Supreme Court on May 19, 1976. The Court affirmed that the Northern Cheyenne Tribe retained mineral rights under their lands, strengthening Tribal sovereignty and protecting the land from exploitation. This ruling not only secured the Tribe’s ownership and control of the minerals beneath their lands but also supported future generations. Additionally, it helped preserve the cultural and spiritual landscapes critical to the Cheyenne language and heritage.