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 "Powder River Country"): The area is loosely defined as that between the Bighorn Mountains and the Black Hills, in the upper drainage areas of the Powder, Tongue, and Little Bighorn rivers.
Relevant evidence: No