The Arapaho are a Native American people 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.
Red Cloud's War was an armed conflict between an alliance of the Lakota, Northern Cheyenne, and Northern Arapaho peoples against the United States and the Crow Nation that took place in the Wyoming and Montana territories from 1866 to 1868. The war was fought over control of the western Powder River Country in present day north-central Wyoming and Montana.
The Battle of the Rosebud took place on June 17, 1876, in the Montana Territory between the United States Army and its Crow and Shoshoni allies against a force consisting mostly of Lakota Sioux and Northern Cheyenne Indians during the Great Sioux War of 1876. The Cheyenne called it the Battle Where the Girl Saved Her Brother because of an incident during the fight involving Buffalo Calf Road Woman. General George Crook's offensive was stymied by the Indians, led by Crazy Horse, and he awaited reinforcements before resuming the campaign in August.
The Sioux Wars were a series of conflicts between the United States and various subgroups of the Sioux people which occurred in the later half of the 19th century. The earliest conflict came in 1854 when a fight broke out at Fort Laramie in Wyoming, when Sioux warriors killed 31 American soldiers in the Grattan Massacre, and the final came in 1890 during the Ghost Dance War.
The Powder River Expedition of 1865 also known as the Powder River War or Powder River Invasion, was a large and far-flung military operation of the United States Army against the Lakota Sioux, Cheyenne, and Arapaho Indians in Montana Territory and Dakota Territory. Although soldiers destroyed one Arapaho village and established Fort Connor to protect gold miners on the Bozeman Trail, the expedition is considered a failure because it failed to defeat or intimidate the Indians.
The Dull Knife Fight, or the Battle on the Red Fork, part of the Great Sioux War of 1876, was fought on November 25, 1876, in present-day Johnson County, Wyoming between soldiers and scouts of the United States Army and warriors of the Northern Cheyenne. The battle essentially ended the Northern Cheyennes' ability to continue the fight for their freedom on the Great Plains.
The Colorado War was an Indian War fought in 1864 and 1865 between the Southern Cheyenne, Arapaho, and allied Brulé and Oglala Sioux peoples versus the U.S. Army, Colorado militia, and white settlers in Colorado Territory and adjacent regions. The Kiowa and the Comanche played a minor role in actions that occurred in the southern part of the Territory along the Arkansas River. The Cheyenne, Arapaho, and Sioux played the major role in actions that occurred north of the Arkansas River and along the South Platte River, the Great Platte River Road, and the eastern portion of the Overland Trail. The United States government and Colorado Territory authorities participated through the 1st Colorado Cavalry Regiment, often called the Colorado volunteers. The war was centered on the Colorado Eastern Plains, extending eastward into Kansas and Nebraska.
Spotted Tail was a Sichangu Lakota tribal chief. Famed as a great warrior since his youth, warring on Ute, Pawnee and Absaroke (“Crow”), and having taken a leading part in the Grattan Massacre, he led his warriors in the Colorado and Platte River uprising after the massacre perpetrated by John M. Chivington's Colorado Volunteers on the peaceful Cheyenne and Arapaho camping on Sand Creek, but declined to participate in Red Cloud's War.
The Battle of Powder River, also known as the Reynolds Battle, occurred on March 17, 1876, in Montana Territory, United States, as part of the Big Horn Expedition. The attack on a Northern Cheyenne and Oglala Lakota Indian encampment by Colonel Joseph J. Reynolds initiated the Great Sioux War of 1876. Although destroying a large amount of Indian property, the attack was poorly carried out and solidified Northern Cheyenne and Lakota Sioux resistance to the U.S. attempt to force them to sell the Black Hills and live on a reservation.
Fort Reno also known as Fort Connor or Old Fort Reno, was a wooden fort established on August 15, 1865 by the United States Army in Dakota Territory in present-day Johnson County, Wyoming. The fort was built to protect travelers on the Bozeman Trail from Native American tribes.
The area that eventually became the U.S. state of Montana played little direct role in the American Civil War. The closest the Confederate States Army ever came to the area was New Mexico and eastern Kansas, each over a thousand miles away. There was not even an organized territory using "Montana" until the Montana Territory was created on May 26, 1864, three years after the Battle of Fort Sumter. In 1861, the area was divided between the Dakota Territory and the Washington Territory, and in 1863, it was part of the Idaho Territory.
The 11th Ohio Cavalry Regiment, known in vernacular as the 11th Ohio Cavalry, was a cavalry regiment raised in the name of the governor of Ohio from several counties in southwest Ohio, serving in the Union Army during the American Civil War. The regiment was stationed in the Dakota and Idaho territories on the American frontier to protect travelers and settlers from raids by American Indians.
The Sawyers Fight was part of a surveying expedition in late 1865 to improve the emigrant trails from Nebraska to Montana. Not a military venture, the expedition was named for and led by James A. Sawyers. The expedition was attacked by Arapaho warriors in retribution for losses at the battle of the Tongue River.
Pawnee Scouts were employed by the United States Army in the latter half of the 19th century. Like other groups of Indian scouts, Pawnee men were recruited in large numbers to aid in the ongoing conflicts between settlers and the Native Americans in the United States. Because the Pawnee people were at war with the Sioux and Cheyenne and had been under constant pressure and aggression by those tribes, some of them were more than willing to serve with the army for pay. A number of Pawnee served between 1864 and 1871. They were armed with rifles, revolvers and were issued scout uniforms.
The Battle of Julesburg took place on January 7, 1865, near Julesburg, Colorado between 1,000 Cheyenne, Arapaho, and Lakota Indians and about 60 soldiers of the U.S. army and 40 to 50 civilians. The Indians defeated the soldiers and over the next few weeks plundered ranches and stagecoach stations up and down the South Platte River valley.
The Battle of Platte Bridge, also called the Battle of Platte Bridge Station, on July 26, 1865, was the culmination of a summer offensive by the Lakota Sioux and Cheyenne Indians against the United States army. In May and June the Indians raided army outposts and stagecoach stations over a wide swath of Wyoming and Montana. In July, they assembled a large army, estimated by Cheyenne warrior George Bent to number 3,000 warriors, and descended upon Platte Bridge. The bridge, across the North Platte River near present-day Casper, Wyoming, was guarded by 120 soldiers. In an engagement near the bridge, and another against a wagon train guarded by 28 soldiers a few miles away, the Indians killed 29 soldiers while also suffering at least eight dead.
The Big Horn Expedition, or Bighorn Expedition, was a military operation of the United States Army against the Lakota Sioux and Cheyenne Indians in Wyoming Territory and Montana Territory. Although soldiers destroyed one Northern Cheyenne and Oglala Lakota village at the Battle of Powder River, the expedition solidified Lakota Sioux and Northern Cheyenne resistance against the United States attempt to force them to sell the Black Hills and live on a reservation, beginning the Great Sioux War of 1876.
The Powder River Battles were a series of battles and skirmishes fought between September 1–15, 1865 by United States soldiers and civilians against Sioux, Cheyenne, and Arapaho warriors. The fighting occurred along the Powder River in Montana Territory and Dakota Territory, in present-day Custer and Powder River counties, Montana and northeastern Wyoming.
The Powder River Massacre, part of the Powder River Expedition, occurred on August 17, 1865, and was carried out by United States soldiers and Pawnee scouts against 24 Cheyenne people. The incident occurred near the Powder River in Dakota Territory, in present-day Johnson County, Wyoming.
Black Bear was an Arapaho leader into the 1860s when the Northern Arapaho, like other Native American tribes, were prevented from ranging through their traditional hunting grounds due to settlement by European-Americans who came west during the Pike's Peak Gold Rush. Conflicts erupted over land and trails used by settlers and miners. A watershed event was the Sand Creek massacre of 1864. This led to the Northern Arapaho joining with other tribes to prevent settlement in their traditional lands. In 1865, Black Bear's village was attacked during the Battle of the Tongue River. People died, lodges were set on fire, and food was ruined, all of which made it difficult for them to survive as a unit. He died during an ambush by white settlers on April 8, 1870, in the Wild Wind Valley of present-day Wyoming.
United States 
