The Standing Rock Sioux Reservation covers more than two million acres of grass plains, rolling hills, and buttes running alongside the Missouri River. The reservation takes its name from a sacred rock formation that resembles a woman with a child on her back. This sacred stone stands outside the Standing Rock Agency office in Fort Yates, North Dakota. The Standing Rock Sioux Tribe is part of what was known as the Great Sioux Nation. The stone once stood in an Arikara village in the vicinity of the old town Winona,…