Now you think it over. It is not the only late 19th century map of Montana which shows a Fort Assinibone Indian Reservation where the present day Rocky Boy Reservation is. Most maps of Montana of the late 19th century show the Fort Assinibone Military Reservation where present day Rocky Boy Reservation is located. We know a cover-up is in place and it is over a huge Chippewa Reservation in Montana. It is not the 21.5 million acre Blackfeet Reservation.