The museum's mission is to educate the general public on the Western Migration Movement and the Battle of the Little Bighorn. This institution collects, preserves and exhibits artifacts, beadwork, photographs, paintings, rare books, and manuscripts. The Tomb of the United States Unknown Soldier is maintained by this institution. The Museum is a non-profit 501(c)3, supported through private funding. The museum is located where the Battle of the Little Big Horn began at Sitting Bull's camp.