The Three Affiliated Tribes of the Fort Berthold Indian Reservation consist of the Mandan, Hidatsa, and Arikara tribes. Located in North Dakota, the reservation was established in 1851 and spans over 1 million acres along the Missouri River. The tribes share a rich cultural heritage and history, with each contributing unique traditions and languages. The Fort Berthold Reservation is home to various economic activities, including agriculture, energy development, and tourism. The tribes work together to promote their cultural identity and improve the quality of life for their members through education, health services, and community programs.