History & Culture of the Mandan Hidatsa & Sahnish (Arikara) is a guide to the Three Affiliated Tribes nation, past and present. The book is divided into three sections: one for each tribe. Elders, scholars, and other experts from the nation contributed the content of this book, which was reviewed by Nueta Hidatsa Sahnish College and published by the North Dakota Department of Public Instruction (NDDPI) for use in middle and high school North Dakota Studies classes, as well as in higher education.
The MHA nation is known as the following in its languages: Mandan: Miiti Naamni, Hidatsa: Awadi Aguraawi, Arikara: ačitaanu' táWIt. The Fort Berthold Indian Reservation shares geography with western North Dakota, with land on either side of the Missouri River basin. New Town is this sovereign nation's capital.