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?

Context articles: Powder River Station-Powder River Crossing
Red Cloud
Little Powder River
Powder River Basin
Biddle, Montana
Powderville, Montana
Powder River (Wyoming and Montana)
Johnson County War
Powder River Country
Red Cloud's War

The Powder River Crossing, officially known as Powder River Station-Powder River Crossing (48JO134 and 48JO801), is an abandoned settlement located on the east bank of the Powder River in southeast Johnson County about twenty-four miles east of Kaycee, Wyoming.
 It developed after a wooden toll bridge was built across the Powder River in 1877, at a site that was originally used as a ford.
 With crossing secured, a settlement developed here in the late 19th century, incorporating a stage stop on the Bozeman Trail.
 The site is notable for having well-preserved wagon ruts from the pioneer era.
Red Cloud (Lakota: Maȟpíya Lúta) (1822 – December 10, 1909) was one of the most important leaders of the Oglala Lakota.
 He led from 1868 to 1909.
 One of the most capable Native American opponents that the United States Army faced in its mission to subdue the western territories, he led a successful campaign in 1866–1868 known as Red Cloud's War over control of the Powder River Country in northeastern Wyoming and southern Montana.
 The largest action of the war, the Fetterman Fight (with 81 men killed on the US side), was the worst military defeat suffered by the US on the Great Plains until the Battle of the Little Bighorn ten years later.
The Little Powder River is a tributary of the Powder River, in southeastern Montana and northeastern Wyoming in the United States.
 It drains an area historically known as the Powder River Country on the high plains east of the Bighorn Mountains.
The Powder River Basin is a geologic structural basin in southeast Montana and northeast Wyoming, about 120 mi east to west and 200 mi north to south, known for its coal deposits.
 The region supplies about 40 percent of coal in the United States.
 It is both a topographic drainage and geologic structural basin.
 The basin is so named because it is drained by the Powder River, although it is also drained in part by the Cheyenne River, Tongue River, Bighorn River, Little Missouri River, Platte River, and their tributaries.
Biddle is a census-designated place in southeastern Powder River County, Montana, United States, near the Little Powder River.
 It lies along Highway 59, just south of Ranch Creek Road, and south of the town of Broadus, the county seat of Powder River County.
 Its elevation is 3,337 feet (1,017 m).
 A post office was established in Biddle in 1916.
Powderville, also Elkhorn Crossing is an unincorporated community in northeastern Powder River County, Montana, United States, along the Powder River.
 It is a small cluster of buildings that lies along local roads northeast of the town of Broadus, the county seat of Powder River County.
 Its elevation is 2,828 feet (862 m).
Powder River is a tributary of the Yellowstone River, approximately 375 mi long in northeastern Wyoming and southeastern Montana in the United States.
 It drains an area historically known as the Powder River Country on the high plains east of the Bighorn Mountains.
The Johnson County War, also known as the War on Powder River and the Wyoming Range War, was a series of range conflicts that took place in Johnson County, Wyoming between 1889 and 1893.
 The conflicts started when cattle companies ruthlessly persecuted supposed rustlers throughout the grazing lands of Wyoming.
 As tensions swelled between the large established ranchers and the smaller settlers in the state, violence finally culminated in Powder River Country, when the ranchers hired armed gunmen to invade the county and wipe out or scare off the small settlers they were competing against.
 When word came out of the gunmen's initial incursion in the territory, the small farmers and ranchers, as well as the state lawmen, formed a posse of 200 men to fight them, which led to a grueling stand-off.
 The conflict ended when the United States Cavalry, on the orders of President Benjamin Harrison, relieved the two forces, although further conflicts persisted in the following months.
The Powder River Country is the Powder River Basin area of the Great Plains in northeastern Wyoming, United States.
 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.
Red Cloud's War (also referred to as the Bozeman War or the Powder River War) was an armed conflict between the Lakota, Northern Cheyenne, and Northern Arapaho on one side and the United States in Wyoming and Montana territories from 1866 to 1868.
 The war was fought over control of the western Powder River Country in present north-central Wyoming.
 This grassland, rich in buffalo, was traditionally Crow Indian land, but the Lakota had recently taken control.
 The Crow tribe held the treaty right to the disputed area, according to the major agreement reached at Fort Laramie in 1851.
 All involved in "Red Cloud's War" were parties in that treaty.