
The Apache Wars were a series of armed conflicts between the United States Army and various Apache nations fought in the southwest between 1849 and 1886, though minor hostilities continued until as late as 1924. The United States inherited conflicts between American settlers and Apache groups when Mexico ceded territory after the Mexican–American War in 1846. These conflicts were continued as new United States citizens came into traditional Apache lands to raise livestock, crops and to mine minerals.

The Apache–Mexico Wars, or the Mexican Apache Wars, refer to the conflicts between Spanish or Mexican forces and the Apache peoples. The wars began in the 1600s with the arrival of Spanish colonists in present-day New Mexico. War between the Mexicans and the Apache was especially intense from 1831 into the 1850s. Thereafter, Mexican operations against the Apache coincided with the Apache Wars of the United States, such as during the Victorio Campaign. Mexico continued to operate against hostile Apache bands as late as 1915.

The Arikara War was an armed conflict between the United States, their allies from the Sioux tribe and Arikara Native Americans that took place in the summer of 1823, along the Missouri River in present-day South Dakota. It was the first Indian war west of the Missouri fought by the U.S. Army and its only conflict ever with the Arikara. The war came as a response to an Arikara attack on trappers, called "the worst disaster in the history of the Western fur trade".

Bald Hills War (1858–1864) was a war fought by the forces of the California Militia, California Volunteers and soldiers of the U. S. Army against the Chilula, Lassik, Hupa, Mattole, Nongatl, Sinkyone, Tsnungwe, Wailaki, Whilkut and Wiyot Native American peoples.

Pierre's Hole is a shallow valley in the western United States in eastern Idaho, just west of the Teton Range in Wyoming. At an elevation over 6,000 feet (1,830 m) above sea level, it collects the headwaters of the Teton River, and was a strategic center of the fur trade of the northern Rocky Mountains. The nearby Jackson's Hole area in Wyoming is on the opposite side of the Tetons.

The Bear River Massacre, or the Engagement on the Bear River, or the Battle of Bear River, or Massacre at Boa Ogoi, took place in present-day Franklin County, Idaho on January 29, 1863. After years of skirmishes and food raids on farms and ranches, the United States Army attacked a Shoshone encampment, gathered at the confluence of the Bear River and Battle Creek in what was then southeastern Washington Territory, near the present-day city of Preston. Colonel Patrick Edward Connor led a detachment of California Volunteers as part of the Bear River Expedition against Shoshone tribal chief Bear Hunter. Hundreds of Shoshone men, women and children were killed near their lodges; the number of Shoshone victims reported by local settlers was higher than that reported by soldiers.

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.

The Comanche Wars were a series of armed conflicts fought between Comanche peoples and Spanish, Mexican, and American militaries and civilians in the United States and Mexico from as early as 1706 until at least the mid-1870s. The Comanche were the Native American inhabitants of a large area known as Comancheria, which stretched across much of the southern Great Plains from Colorado and Kansas in the north through Oklahoma, Texas, and eastern New Mexico and into the Mexican state of Chihuahua in the south. For more than 150 years, the Comanche were the dominant native tribe in the region, known as “the Lords of the Southern Plains”, though they also shared parts of Comancheria with the Wichita, Kiowa, and Kiowa Apache and, after 1840, the southern Cheyenne and Arapaho.

The Comanche–Mexico Wars was the Mexican theater of the Comanche Wars, a series of conflicts from 1821 to 1870. There were large-scale raids into northern Mexico by the Comanche and their Kiowa and Kiowa Apache allies, which left thousands of people dead. The Comanche raids were sparked by the declining military capability of Mexico during the turbulent years after it gained independence in 1821, as well as a large and growing market in the United States for stolen Mexican horses and cattle.

Fort Walla Walla is a United States Army fort located in Walla Walla, Washington. The first Fort Walla Walla was established July 1856, by Lieutenant Colonel Edward Steptoe, 9th Infantry Regiment. A second Fort Walla Walla was occupied September 23, 1856. The third and permanent military Fort Walla Walla was built in 1858 and adjoined Steptoeville, now Walla Walla, Washington, a community that had grown up around the second fort. An Executive Order on May 7, 1859 declared the fort a military reservation containing 640 acres devoted to military purposes and a further 640 acres each of hay and timber reserves. On September 28, 1910 soldiers from the 1st Cavalry lowered the flag closing the fort. In 1917, the fort briefly reopened to train men of the First Battalion Washington Field Artillery in support of action in World War I. In 1921, the fort and property were turned over to the Veterans Administration where 15 original buildings from the military era remain. Today, the complex contains a park, a museum, and the Jonathan M. Wainright Memorial VA Medical Center.

The Great Sioux War of 1876, also known as the Black Hills War, was a series of battles and negotiations that occurred in 1876 and 1877 in an alliance of Lakota Sioux and Northern Cheyenne against the United States. The cause of the war was the desire of the US 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 the Cheyenne refused to cede ownership. Traditionally, American military and historians place the Lakota at the center of the story, especially because of their numbers, but some Native Americans believe the Cheyenne were the primary target of the American campaign.

The Hualapai War, or Walapai War, was an armed conflict fought from 1865 to 1870 between the Hualapai native Americans and the United States in Arizona Territory. The Yavapai also participated on the side of the Hualapai and Mohave scouts were employed by the United States Army. Following the death of the prominent Yavapai leader Anasa in April 1865, the natives began raiding American settlements which provoked a response by the United States Army forces stationed in the area. By the spring of 1869 disease forced the majority of the Hualapais to surrender though some skirmishing continued for almost two more years.

The Jicarilla War began in 1849 and was fought between the Jicarilla Apaches and the United States Army in the New Mexico Territory. Ute warriors also played a significant role in the conflict as they were allied with the Jicarillas. The war started when the Apaches and Utes began raiding against settlers on the Santa Fe Trail. Eventually, in 1853, the American army retaliated which resulted in a series of battles and campaigns that ended in 1854 when a large military expedition managed to quell most of the violence. However, some minor skirmishing continued into 1855.

The Battle of Little Muddy Creek, also known as the Lame Deer Fight, was fought on May 7–8, 1877, by United States soldiers and scouts against a village of Miniconjou Lakota and Northern Cheyenne. The battle occurred near Little Muddy Creek in Montana Territory, near present-day Lame Deer, Rosebud County.

The Mendocino War was the genocide of the Yuki between July 1859 to January 18, 1860 by white settlers in Mendocino County, California. It was caused by settler intrusion and slave raids on native lands and subsequent native retaliation, resulting in the deaths of hundreds of natives. In 1859, a band of locally sponsored rangers led by Walter S. Jarboe, called the Eel River Rangers, raided the countryside in an effort to remove natives from settler territory and move them onto the Nome Cult Farm, an area near the Mendocino Indian Reservation. By the time the Eel River Rangers were disbanded in 1860, Jarboe and his men had killed 283 warriors, captured 292, killed countless women and children, and only suffered 5 casualties themselves in just 23 engagements. The bill to the state for the rangers' services amounted to $11,143.43. Scholars, however, state that the damage to the area and natives in particular was even higher than reported, especially given the vast number of raiding parties formed outside of the Eel River Rangers. Frustrated with the inadequacy of federal protection, settlers formed their own raiding parties against the natives, joining Jarboe in his mission to rid Round Valley of its native population. Those that survived were moved to the Nome Cult Farm, where they experienced hardships typical of the reservation system of the day. After the conflict, contemporaries claimed that the conflict was more of a slaughter than a war, and later historians have labeled it a genocide.

The Modoc War, or the Modoc Campaign, was an armed conflict between the Native American Modoc people and the United States Army in northeastern California and southeastern Oregon from 1872 to 1873. Eadweard Muybridge photographed the early part of the US Army's campaign.

The Mohave War was an armed conflict between the Mohave people against the United States from 1858 to 1859. With the California Gold Rush of 1849, thousands of American settlers headed west through Mohave country and into California. The influx of migrants passing through, combined with simple misunderstandings, led to conflict. Fort Mohave on the Arizona side of the Colorado River was built for operations against the hostile natives and was the second American military post established on the river after Fort Yuma. Eventually advanced weaponry and tactics forced the Mohave and their allies to surrender. After the signing of a peace treaty in 1859, the Mohave never again opposed the United States through warfare. The peace also ended a long guerrilla war between the Mohave and the Maricopa of south central Arizona.

The term Navajo Wars covers at least three distinct periods of conflict in the American West: the Navajo against the Spanish ; the Navajo against the Mexican government ; and the Navajo against the United States. These conflicts ranged from small-scale raiding to large expeditions mounted by governments into territory controlled by the Navajo. The Navajo Wars also encompass the widespread raiding that took place throughout the period; the Navajo raided other tribes and nearby settlements, who in return raided into Navajo territory, creating a cycle of raiding that perpetuated the conflict.

The Nez Perce in Yellowstone Park was the flight of the Nez Perce Indians through Yellowstone National Park between August 20 and Sept 7, during the Nez Perce War in 1877. As the U.S. army pursued the Nez Perce through the park, a number of hostile and sometimes deadly encounters between park visitors and the Indians occurred. Eventually, the army's pursuit forced the Nez Perce off the Yellowstone plateau and into forces arrayed to capture or destroy them when they emerged from the mountains of Yellowstone onto the valley of Clark's Fork of the Yellowstone River.

The Nez Perce War was an armed conflict that pitted several bands of the Nez Perce tribe of Native Americans and their allies, a small band of the Palouse tribe led by Red Echo (Hahtalekin) and Bald Head, against the United States Army. The conflict, fought between June and October 1877, stemmed from the refusal of several bands of the Nez Perce, dubbed "non-treaty Indians," to give up their ancestral lands in the Pacific Northwest and move to an Indian reservation in Idaho. This forced removal was in violation of the 1855 Treaty of Walla Walla, which granted the tribe 7.5 million acres in their ancestral lands and the right to hunt and fish in lands ceded to the government.

Philip Henry Sheridan was a career United States Army officer and a Union general in the American Civil War. His career was noted for his rapid rise to major general and his close association with General-in-chief Ulysses S. Grant, who transferred Sheridan from command of an infantry division in the Western Theater to lead the Cavalry Corps of the Army of the Potomac in the East. In 1864, he defeated Confederate forces under General Jubal Early in the Shenandoah Valley and his destruction of the economic infrastructure of the Valley, called "The Burning" by residents, was one of the first uses of scorched-earth tactics in the war. In 1865, his cavalry pursued Gen. Robert E. Lee and was instrumental in forcing his surrender at Appomattox.

The Puget Sound War was an armed conflict that took place in the Puget Sound area of the state of Washington in 1855–56, between the United States military, local militias and members of the Native American tribes of the Nisqually, Muckleshoot, Puyallup, and Klickitat. Another component of the war, however, were raiders from the Haida and Tlingit who came into conflict with the United States Navy during contemporaneous raids on the native peoples of Puget Sound. Although limited in its magnitude, territorial impact and losses in terms of lives, the conflict is often remembered in connection to the 1856 Battle of Seattle and to the execution of a central figure of the war, Nisqually Chief Leschi. The contemporaneous Yakima War may have been responsible for some events of the Puget Sound War, such as the Battle of Seattle, and it is not clear that the people of the time made a strong distinction between the two conflicts.

Red Cloud's War was an armed conflict between an alliance of the Lakota, Northern Cheyenne, and Northern Arapaho peoples and the United States 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 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.

The Red River War was a military campaign launched by the United States Army in 1874 to displace the Comanche, Kiowa, Southern Cheyenne, and Arapaho Native American tribes from the Southern Plains, and forcibly relocate the tribes to reservations in Indian Territory. Lasting only a few months, the war had several army columns crisscross the Texas Panhandle in an effort to locate, harass, and capture highly mobile Native American bands. Most of the engagements were small skirmishes in which neither side suffered many casualties. The war wound down over the last few months of 1874, as fewer and fewer Indian bands had the strength and supplies to remain in the field. Though the last significantly sized group did not surrender until mid-1875, the war marked the end of free-roaming Indian populations on the southern Great Plains.

The Rogue River Wars were an armed conflict in 1855–1856 between the U.S. Army, local militias and volunteers, and the Native American tribes commonly grouped under the designation of Rogue River Indians, in the Rogue River Valley area of what today is southern Oregon. The conflict designation usually includes only the hostilities that took place during 1855–1856, but there had been numerous previous skirmishes, as early as the 1830s, between European-American settlers and the Native Americans, over territory and resources.

Meeker Massacre and the White River War, Ute War, or the Ute Campaign, were conflicts that began when the Utes attacked an Indian agency on September 29, 1879, killing the Indian agent Nathan Meeker and his 10 male employees for his misdeeds, and then took women and children as hostages. United States Army forces were called in from Fort Steele in Wyoming. Following the killing of Meeker and others, there was a Ute attack at Milk Creek on U.S. troops led by Major Thomas T. Thornburgh, which killed the major and 13 troops within minutes. Relief troops were called in, which resulted in a further conflict of the Utes trying to regain their lands.

The Sand Creek massacre was a massacre of Cheyenne and Arapaho people by the U.S. Army in the American Indian Wars that occurred on November 29, 1864, when a 675-man force of the Third Colorado Cavalry under the command of U.S. Volunteers Colonel John Chivington attacked and destroyed a village of Cheyenne and Arapaho people in southeastern Colorado Territory, killing and mutilating an estimated 70 to 500 Native American people, about two-thirds of whom were women and children. The location has been designated the Sand Creek Massacre National Historic Site and is administered by the National Park Service. This was part of a series of events known as the Colorado War and was preceded by the Hungate massacre.

The Seminole Wars were three related military conflicts in Florida between the United States and the Seminole, citizens of a Native American nation which formed in the region during the early 18th century. Hostilities commenced about 1816 and continued through 1858, with two periods of uneasy truce between active conflict. Both in human and financial cost to the United States, the Seminole Wars were the longest and most expensive of the United States-American Indian Wars.

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 Coeur d'Alene War of 1858, also known as the Spokane-Coeur d'Alene-Pend d'oreille-Paloos War, was the second phase of the Yakima War, involving a series of encounters between the allied Native American tribes of the Skitswish, Kalispell, Spokane, Palouse and Northern Paiute against United States Army forces in Washington and Idaho.

Native American weaponry was used by Native American warriors to hunt and to do battle with other Native American tribes and European colonizers.

The Yakima War (1855-1858) was a conflict between the United States and the Yakama, a Sahaptian-speaking people of the Northwest Plateau, then part of Washington Territory, and the tribal allies of each. It primarily took place in the southern interior of present-day Washington. Isolated battles in western Washington and the northern Inland Empire were sometimes separately referred to as the Puget Sound War and the Palouse War, respectively. This conflict is also referred to as the Yakima Native American War of 1855.

The Yuma War was the name given to a series of United States military operations conducted in southern California and what is today southwestern Arizona from 1850 to 1853. The Quechan were the primary opponent of the United States Army, though engagements were fought between the Americans and other native groups in the region.