The Northern Cheyenne Exodus, also known as Dull Knife's Raid, the Cheyenne War, or the Cheyenne Campaign, was the attempt of the Northern Cheyenne to return to the north, after being placed on the Southern Cheyenne reservation in the Indian Territory, and the United States Army operations to stop them. The period lasted from 1878 to 1879.

The Northern Cheyenne Tribe of the Northern Cheyenne Indian Reservation is the federally recognized Northern Cheyenne tribe. Located in southeastern Montana, the reservation is approximately 690 square miles (1,800 km2) in size and home to approximately 6,000 Cheyenne people. The tribal and government headquarters are located in Lame Deer, also the home of the annual Northern Cheyenne pow wow.