Hugh Glass

Born in Pennsylvania to Scots-Irish parents , Glass became an explorer of the watershed of the Upper Missouri River, in present-day Montana, the Dakotas, and the Platte River area of Nebraska. His life story has been adapted into two feature-length films: Man in the Wilderness (1971) and The Revenant (2015). They both portray the survival struggle of Glass, who (in the best historical accounts) crawled and stumbled 200 miles (320 km) to Fort Kiowa, South Dakota after being abandoned without supplies or weapons by fellow explorers and fur traders during General Ashley's expedition of 1823.

Is this statement correct "what is the revenant based on a true story"?
yes