
The Great Sioux War of 1876, also known as the Black Hills War, was a series of battles and negotiations which occurred in 1876 and 1877 between the Lakota Sioux and the Northern Cheyenne vs. the United States. The cause of the war was the desire of the U.S. government to obtain ownership of the Black Hills. Gold had been discovered in the Black Hills, settlers began to encroach onto Native American lands, and the Sioux and Cheyenne refused to cede ownership to the U.S. Traditionally, the United States military and historians place the Lakota at the center of the story, especially given their numbers, but some Native Americans believe the Cheyenne were the primary target of the U.S. campaign.

The Arapaho are a tribe of Native Americans historically living on the plains of Colorado and Wyoming. They were close allies of the Cheyenne tribe and loosely aligned with the Lakota and Dakota.

Arikara scouts were enlisted men from the Arikara Nation serving in the U.S. Army at different frontier posts in present-day North Dakota from 1868 to 1881. The enlistment period was six months with re-enlistment possible. Each scout received a uniform, firearm and drew rations. Scout duties ranged from carrying mail between commands to tracking down traditional enemies perceived as hostile by the Army in far ranging military campaigns. Detailed to secure the horses in located enemy camps, the scouts were often the first to engage in battle. The Arikara took part when the Army protected survey crews in the Yellowstone area in the early 1870s. They participated in the Great Sioux War of 1876 and developed into Colonel George Armstrong Custer's "… most loyal and permanent scouts …".

The Black Hills are a small and isolated mountain range rising from the Great Plains of North America in western South Dakota and extending into Wyoming, United States. Black Elk Peak, which rises to 7,244 feet (2,208 m), is the range's highest summit. The Black Hills encompass the Black Hills National Forest. The name "Black Hills" is a translation of the Lakota Pahá Sápa. The hills are so called because of their dark appearance from a distance, as they are covered in evergreen trees.

The Brulé are one of the seven branches or bands of the Teton (Titonwan) Lakota American Indian people. They are known as Sičháŋǧu Oyáte, or "Burnt Thighs Nation", and so, were called Brulé by the French. The name may have derived from an incident where they were fleeing through a grass fire on the plains.

The Cheyenne are one of the indigenous people of the Great Plains whose language is of the Algonquian language family. The Cheyenne comprise two Native American tribes, the Só'taeo'o or Só'taétaneo'o and the Tsétsêhéstâhese. These tribes merged in the early 19th century. Today, the Cheyenne people are split into two federally recognized Nations: the Southern Cheyenne, who are enrolled in the Cheyenne and Arapaho Tribes in Oklahoma, and the Northern Cheyenne, who are enrolled in the Northern Cheyenne Tribe of the Northern Cheyenne Indian Reservation in Montana.

The Crazy Horse Memorial is a mountain monument under construction on privately held land in the Black Hills, in Custer County, South Dakota, United States. It will depict the Oglala Lakota warrior, Crazy Horse, riding a horse and pointing to his tribal land. The memorial was commissioned by Henry Standing Bear, a Lakota elder, to be sculpted by Korczak Ziolkowski. It is operated by the Crazy Horse Memorial Foundation, a nonprofit organization.

The Crow, whose autonym is Apsáalooke, also spelled Absaroka, are Native Americans living primarily in southern Montana. Today, the Crow people have a federally recognized tribe, the Crow Tribe of Montana, with an Indian reservation located in the south-central part of the state.

Crow Scouts worked with the United States Army in several conflicts, the first in 1876 during the Great Sioux War. Because the Crow Nation was at that time at peace with the United States, the army was able to enlist Crow warriors to help them in their encroachment against the Native Americans with whom they were at war. In 1873, the Crow called for U.S. military actions against the Indigenous people they reported were trespassing into the newly-designated Crow reservation territories.

The Custer Military Trail Historic Archeological District is a national historic district consisting of 18,149 acres (7,345 ha) located in Billings and Golden Valley Counties in North Dakota. The district includes five historic sites associated with the Plains Indian War from 1864 to 1876. The historic sites include Initial Rock, a site where George Custer's 7th Cavalry Regiment camped on May 28, 1876, en route to Little Bighorn. Two privates in Custer's regiment, W. C. Williams and F. Neely, carved their initials into a sandstone boulder at the site. The district also includes two additional military campsites, the site of the Battle of the Badlands, and portions of a military supply trail. The district was listed on the National Register of Historic Places in 2009. The district has five contributing sites.

Fort Abraham Lincoln State Park is a North Dakota state park located 7 miles (11 km) south of Mandan, North Dakota, United States. The park is home to the replica Mandan On-A-Slant Indian Village and reconstructed military buildings including the Custer House.
Fort Assinniboine was a United States Army fort located in present-day north central Montana. It was built in 1879 and operated by the Army through 1911. The 10th Cavalry Buffalo Soldiers, made up of African-American soldiers, were among the units making up the garrison at the fort. Determining that this fort was no longer needed after the end of the Indian Wars, the US Army closed and abandoned it.

Fort Fetterman was a wooden fort constructed in 1867 by the United States Army on the Great Plains frontier in Dakota Territory, approximately 11 miles northwest of present-day Douglas, Wyoming. Located high on the bluffs south of the North Platte River, it served as a major base for the start of several United States military expeditions against warring Native American tribes. The main role of the soldiers was to protect European-American pioneers on the Bozeman Trail. The fort is listed on the National Register of Historic Places.

Fort Robinson is a former U.S. Army fort and now a major feature of Fort Robinson State Park, a 22,000-acre (8,900 ha) public recreation and historic preservation area located 2 miles (3.2 km) west of Crawford on U.S. Route 20 in the Pine Ridge region of northwest Nebraska.

The Hunkpapa are a Native American group, one of the seven council fires of the Lakota tribe. The name Húŋkpapȟa is a Lakota word, meaning "Head of the Circle". By tradition, the Húŋkpapȟa set up their lodges at the entryway to the circle of the Great Council when the Sioux met in convocation. They speak Lakȟóta, one of the three dialects of the Sioux language.

Initial Rock, also known as Name Rock, in the Medora Ranger District of the Little Missouri National Grassland, near Medora, North Dakota, was listed on the National Register of Historic Places (NRHP) in 1976. It was the site of an overnight camp on May 28, 1876 of George Armstrong Custer's men, on their way to the Battle of Little Big Horn, which happened on June 25, 1876. The NRHP listing included one contributing site and one contributing object on 9.9 acres (4.0 ha).

Little Bighorn Battlefield National Monument preserves the site of the June 25 and 26, 1876, Battle of the Little Bighorn, near Crow Agency, Montana, in the United States. It also serves as a memorial to those who fought in the battle: George Armstrong Custer's 7th Cavalry and a combined Lakota-Northern Cheyenne and Arapaho force. Custer National Cemetery, on the battlefield, is part of the national monument. The site of a related military action led by Marcus Reno and Frederick Benteen is also part of the national monument, but is about 3 miles (5 km) southeast of the Little Bighorn battlefield.

The Little Bighorn River is a 138-mile-long (222 km) tributary of the Bighorn River in the United States in the states of Montana and Wyoming. The Battle of the Little Bighorn, also known as the Battle of the Greasy Grass, was fought on its banks on June 25–26, 1876, as well as the Battle of Crow Agency in 1887.

The Miniconjou are a Native American people constituting a subdivision of the Lakota people, who formerly inhabited an area in western present-day South Dakota from the Black Hills in to the Platte River. The contemporary population lives mostly in west-central South Dakota. Perhaps the most famous Miniconjou chief was Touch the Clouds.

Mount Rushmore National Memorial is centered on a colossal sculpture carved into the granite face of Mount Rushmore in the Black Hills in Keystone, South Dakota. Sculptor Gutzon Borglum created the sculpture's design and oversaw the project's execution from 1927 to 1941 with the help of his son, Lincoln Borglum. The sculpture features the 60-foot (18 m) heads of Presidents George Washington (1732–1799), Thomas Jefferson (1743–1826), Theodore Roosevelt (1858–1919), and Abraham Lincoln (1809–1865), as recommended by Borglum. The four presidents were chosen to represent the nation's birth, growth, development, and preservation, respectively. The memorial park covers 1,278 acres and the actual mountain has an elevation of 5,725 feet (1,745 m) above sea level.

The Pawnee are a Central Plains Indian tribe that historically were based in Nebraska and Kansas and currently are based in Oklahoma. Today they are the federally recognized Pawnee Nation of Oklahoma, who are headquartered in Pawnee, Oklahoma. Their Pawnee language belongs to the Caddoan language family, and their names for themselves is Chatiks si chatiks or "Men of Men".

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.

The Model 1873 "Trapdoor" Springfield was the first standard-issue breech-loading rifle adopted by the United States Army. The gun, in both full-length and carbine versions, was widely used in subsequent battles against the American Indians.

Two Kettles or Oóhenuŋpa are one of the seven subtribes of the Lakota people who, along with the Dakota, make up the Očhéthi Šakówiŋ. They reside on the Cheyenne River Indian Reservation.