Question: The Little Powder River is a tributary of the Powder River, in southeastern Montana and northeastern Wyoming, it drains an area historically known as the Powder River Country, is the Powder River Basin area of the Great Plains in northeastern Wyoming, in which country?
Sentence (from "Red Cloud's War"): The Crow tribe held the treaty right to the disputed area, according to the major agreement reached at Fort Laramie in 1851.
Relevant evidence: No