sentences:  The Assiniboine and Gros Ventre tribes at the Fort Belknap Indian Reservation will also receive a portion of this herd.In November 2014, an additional 136 American Bison from Yellowstone National Park were added to the Fort Peck Herd.The preserve has also been enlarged to as Fort Peck Fish and Game works toward their target goal of 1,000 bison, which scientists feel is the minimum herd size necessary to restore the Bison to the role they once had in the environment.