In researching the history of Indian Boarding Schools in Minnesota, I came across the story of how the U.S. government stole the sacred Pipestone quarry from the Ihanktonwan people. (The federal government calls them the Yankton Sioux Tribe.)
In Dakota, Ihanktonwan means “People of the End Village People,” according to the Ihanktonwan Community College. “The Ihanktonwan are also known as the ‘Land of the Friendly People of the Seven Council Fires,'” known in Dakota as the Oceti Sakowin.
Historically, the Ihanktonwan’s role included protecting the sacred Pipestone Quarry, Wikipedia says,
The U.S. government took away that sacred duty.