
The Territory of Arizona was a territory of the United States that existed from February 24, 1863 until February 14, 1912, when the remaining extent of the territory was admitted to the Union as the state of Arizona. It was created from the western half of the New Mexico Territory during the American Civil War.

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.

Arizona Miner was a newspaper published in Prescott, Arizona Territory, from 1868 to 1885 and circulated throughout Yavapai County. The paper merged with the Arizona Weekly Journal in 1885 to create the Arizona Weekly Journal-Miner, which was published until 1934. It underwent a succession of owners and changes in its publishing frequency as well as its political leanings.

The Arizona Pioneers' Home, also known as the Home for Arizona Pioneers and State Hospital for Disabled Miners, is a retirement home in Prescott, Arizona, established to provide housing for early Arizona pioneers. The home is operated and funded by the state of Arizona. The building is listed on the National Register of Historic Places.

The Battle of Salt River Canyon, the Battle of Skeleton Cave, or the Skeleton Cave Massacre was the first principal engagement during the 1872 Tonto Basin Campaign under the command of Lieutenant Colonel George Crook. It was part of the Yavapai War from 1871 to 1875.

The Battle of Turret Peak occurred March 27, 1873 in the Arizona Territory between the United States Army and a group of Yavapai and Tonto Apaches as part of Lieutenant Colonel George Crook's campaign to return the natives to reservations.

In October 1857, an expedition led by Edward Fitzgerald Beale was tasked with establishing a trade route along the 35th parallel from Fort Smith, Arkansas to Los Angeles, California.

The Battle of Big Dry Wash was fought on July 17, 1882, between troops of the United States Army's 3rd Cavalry Regiment and 6th Cavalry Regiment and members of the White Mountain Apache tribe.The location of the battle was called "Big Dry Wash" in Major Evans' official report, but later maps called the location "Big Dry Fork", which is how it is cited in the four Medal of Honor citations that resulted from the battle.

The Black Hawk War, or Black Hawk's War, is the name of the estimated 150 battles, skirmishes, raids, and military engagements taking place from 1865 to 1872, primarily between Mormon settlers in Sanpete County, Sevier County and other parts of central and southern Utah, and members of 16 Ute, Southern Paiute, Apache and Navajo tribes, led by a local Ute war chief, Antonga Black Hawk. The conflict resulted in the abandonment of some settlements and hindered Mormon expansion in the region.

The Bonneville Expedition was a military operation launched by the United States Army in 1857 at the beginning of the Chiricahua Apache Wars. Colonel Benjamin Bonneville, Lieutenant Dixon S. Miles, and Colonel William W. Loring commanded parties which headed west from Fort Fillmore, New Mexico Territory. The expedition quickly engaged Apaches in two small but significant battles, the first in the Black Range and the second along the Gila River near present-day Safford, Arizona.

Cairook, also known as Avi Havasuts was a Mohave leader born sometime before 1814.

The Camp Grant massacre, on April 30, 1871, was an attack on Pinal and Aravaipa Apaches who surrendered to the United States Army at Camp Grant, Arizona, along the San Pedro River. The massacre led to a series of battles and campaigns fought between the Americans, the Apache, and their Yavapai allies, which continued into 1875, the most notable being General George Crook's Tonto Basin Campaign of 1872 and 1873.

Camp Grant was the name used from 1866 to 1872 for the United States military post at the confluence of the San Pedro River and Aravaipa Creek in the Arizona Territory. It is near the site of the Camp Grant massacre.

Camp Harry J. Jones was an encampment of the United States Army. Located near Douglas, Arizona, it was active during the Pancho Villa Expedition and World War I.

The Battle of Cibecue Creek was an engagement of the Apache Wars, fought in August 1881 between the United States and White Mountain Apaches in Arizona, at Cibecue Creek on the Fort Apache Indian Reservation. After an army expedition of scouts, U.S. Army soldiers 'arrested' a prominent Cibecue Apache medicine man named Nock-ay-det-klinne. The U.S. Army soldiers were taking Nock-ay-det-klinne back to the fort when they were ambushed by Apache warriors. During the conflict, the U.S. Army soldiers killed Nock-ay-det-klinne. Most of the 23 Apache scouts mutinied, in the largest such action of its kind in U.S. history. The soldiers retreated to Fort Apache. The following day, the White Mountain Apache mounted a counter-attack. The events sparked general unrest and led to White Mountain Apache warriors leaving the Fort Apache Indian Reservation to join forces with the Apache leader of the Bedonkohe band of Chiricahua Apache named Goyahkla, better known as Geronimo.

The Earp Vendetta Ride was a deadly search by a federal posse led by Deputy U.S. Marshal Wyatt Earp for a loose confederation of outlaw "Cowboys" they believed had ambushed his brothers Virgil and Morgan Earp, maiming the former and killing the latter. The two Earp brothers had been attacked in retaliation for the deaths of three Cowboys in the Gunfight at the O.K. Corral on October 26, 1881. From March 20 to April 15, 1882, the federal posse searched southeast Cochise County, Arizona Territory for the men they believed were responsible for the attacks on Virgil and Morgan. Several suspects had been identified and were charged, but were soon released by the court, owing in some cases to legal technicalities and in others to the strength of alibis provided by Cowboy confederates. Wyatt hoped that the legal system would bring the Cowboys to justice, but after suspects in both ambushes were freed, Wyatt resolved to take matters into his own hands.

The Battle of Fort Apache was an engagement of the Apache Wars between the cavalry garrison of Fort Apache and dozens of mounted White Mountain Apache warriors. The battle occurred in eastern Arizona Territory on September 1, 1881.

Fort Bowie was a 19th-century outpost of the United States Army located in southeastern Arizona near the present day town of Willcox, Arizona. The remaining buildings and site are now protected as Fort Bowie National Historic Site.

Fort Buchanan was a United States Army post founded in 1856 three miles southwest of present-day Sonoita in Santa Cruz County, Arizona on the east slope of what is now called Hog Canyon. At the time, the area was under constant threat from hostile Apaches. Full-scale war with the local Chiricahua Apache was initiated by the Bascom affair in early 1861, during which Lieutenant George Nicholas Bascom and his patrol were based at Fort Buchanan.

Fort Crittenden, originally Camp Crittenden, was a United States Army post built in 1867 three miles from Sonoita, Arizona along Sonoita Creek. It was established for campaigning against the Apache and to protect American pioneers in the area.

Fort Date Creek, also known as Camp McPherson or Camp Date Creek, was a United States Army post established in 1867 sixty miles south of Prescott, Arizona. It was built to safeguard American settlers in Yavapai County.

Fort Grant is a state prison and a former United States Army fortification in the U.S. state of Arizona. Fort Grant is located on the southwestern slope of Mount Graham in what is now Graham County. The post is named for Ulysses S. Grant, the 18th President of the United States.
Fort Lowell was a United States Army post active from 1873 to 1891 on the outskirts of Tucson, Arizona. Fort Lowell was the successor to Camp Lowell, an earlier Army installation. The Army chose a location just south of the confluence of the Tanque Verde and Pantano creeks, at the point where they form the Rillito River, due to the year-round supply of water during that period. The Hohokam natives had chosen the site centuries earlier, presumably for the same reason. To this day, shards of Hohokam pottery can still be found in the area. The Army claimed a military reservation that encompassed approximately eighty square miles and extended east toward the Rincon Mountains.

Fort Mohave was originally named Camp Colorado when it was established on April 19, 1859 by Lieutenant Colonel William Hoffman during the Mohave War. It was located on the east bank of the Colorado River, at Beale's Crossing, near the head of the Mohave Valley in Mohave County, Arizona by the recommendation of Lieutenant Edward Fitzgerald Beale. After the end of the Indian Wars, the fort was transferred to the Bureau of Indian Affairs in 1890. In 1935 it was transferred to the Fort Mojave Indian Reservation; the fort is administered by the state of Arizona.

Fort Tyson was a privately owned fort built in 1856 by Charles Tyson in the area which is now called Quartzsite, Arizona. He built the fort to protect the local miners and water supply from the raids of the Yavapai (Mohave-Apache), a Native-American tribe. The area in which Fort Tyson was located has been known as Fort Tyson, Tyson’s Well and is now called the town of Quartzsite because of the large amount of quartz found in its surrounding areas.

Fort Verde State Historic Park in the town of Camp Verde, Arizona is a small park that attempts to preserve parts of the Apache Wars-era fort as it appeared in the 1880s. The park was established in 1970 and was added to the National Register of Historic Places a year later.

Fort Whipple was a U.S. Army post which served as Arizona Territory's capital prior to the founding of Prescott, Arizona. The post was established by Major Edward Banker Willis in December 1863 at Del Rio Springs just north of today's Chino Valley, Arizona. He led Companies C and F of the 1st California Volunteers and built the post under General Order #27 issued by General James Henry Carleton. The post was named Fort Whipple after Amiel Weeks Whipple, a Civil War military officer and topographical engineer. He served as a brigadier general and was mortally wounded on May 7, 1863 at the Battle of Chancellorsville in Virginia.

Irataba was a leader of the Mohave Nation, known as a mediator between the Mohave and the United States. He was born near the Colorado River in present-day Arizona. Irataba was a renowned orator and one of the first Mohave to speak English, a skill he used to develop relations with the United States.

A jail tree is any tree used to incarcerate a person, usually by chaining the prisoner up to the tree. Jail trees were used on the American frontier, in the Territory of Arizona, in the late 19th and early 20th centuries. A few of which survive to this day. Jail trees were also used in Australia, for example Boab Prison Tree, Derby and Boab Prison Tree, Wyndham.

Pah-Ute County is a former county in the northwest corner of Arizona Territory that existed from 1865 until 1871, at which point most of the area was transferred to Nevada. The remainder was merged into Mohave County. The majority of the territory is now in Clark County, Nevada, which includes the city of Las Vegas. Due to the transfer of most of the county's land to Nevada, Pah-Ute is sometimes referred to as Arizona's "Lost County". Pah-Ute is an historic spelling of the tribal name Paiute.

The Pleasant Valley War, sometimes called the Tonto Basin Feud, or Tonto Basin War, or Tewksbury-Graham Feud, was a range war fought in Pleasant Valley, Arizona in the years 1882-1892. The conflict involved two feuding families, the Grahams and the Tewksburys. The Grahams were ranchers, while the Tewksburys, who were part Indian, started their operations as cattle ranchers before branching out to sheep.

The Powell Geographic Expedition of 1869, led by American naturalist John Wesley Powell, was the first thorough cartographic and scientific investigation of long segments of the Green and Colorado rivers in the southwestern United States, including the first recorded passage of white men through the entirety of the Grand Canyon. The expedition, which lasted approximately three months during the summer of 1869, embarked from Green River Station, Wyoming Territory and traveled downstream through parts of the present-day states of Colorado, Utah, and Arizona before reaching the confluence of the Colorado and Virgin rivers in present-day Nevada. Despite a series of hardships, including losses of boats and supplies, near-drownings, and the eventual departures of several crew members, the voyage produced the first detailed descriptions of much of the previously unexplored canyon country of the Colorado Plateau.

The Rose–Baley Party was the first European American emigrant wagon train to traverse the 35th parallel route known as Beale's Wagon Road, established by Edward Fitzgerald Beale, from Zuni Pueblo, New Mexico to the Colorado River near present-day Needles, California.

Saint Joseph is a ghost town in Clark County, Nevada, that was located on the east bank of the Muddy River west of the north end of the Perkins Field in the Moapa Valley.

St. Thomas, Nevada is a ghost town in Clark County, Nevada, near where the Muddy River flows into the Colorado River. St. Thomas was purchased by the US Federal Government and abandoned as the waters of Lake Mead submerged the town in the 1930s. However, as the level of Lake Mead dropped in the 2000s, the ruins of the town resurfaced. It is now located within the Lake Mead National Recreation Area.

Simonsville is a ghost town in Clark County, Nevada, that was located on the east bank of the Muddy River west of the south end of the Overton Airport in the Moapa Valley.
The Skeleton Canyon shootout was a gunfight on August 12, 1896, between members of the High Five Gang and a posse of American lawmen. Following a failed robbery on August 1 of the bank in Nogales, Arizona, the High Fives headed east and split up. The gang's leader, Black Jack Christian, and George Musgrave got away.

Southern Emigrant Trail, also known as the Gila Trail, the Kearny Trail, Southern Trail and the Butterfield Stage Trail, was a major land route for immigration into California from the eastern United States that followed the Santa Fe Trail to New Mexico during the California Gold Rush. Unlike the more northern routes, pioneer wagons could travel year round, mountain passes not being blocked by snows, however it had the disadvantage of summer heat and lack of water in the desert regions through which it passed in New Mexico Territory and the Colorado Desert of California. Subsequently, it was a route of travel and commerce between the eastern United States and California. Many herds of cattle and sheep were driven along this route and it was followed by the San Antonio-San Diego Mail Line in 1857-1858 and then the Butterfield Overland Mail from 1858 - 1861.

Steamboats on the Colorado River operated from the river mouth at the Colorado River Delta on the Gulf of California in Mexico, up to the Virgin River on the Lower Colorado River Valley in the Southwestern United States from 1852 until 1909, when the construction of the Laguna Dam was completed. The shallow draft paddle steamers were found to be the most economical way to ship goods between the Pacific Ocean ports and settlements and mines along the lower river, putting in at landings in Sonora state, Baja California Territory, California state, Arizona Territory, New Mexico Territory, and Nevada state. They remained the primary means of transportation of freight until the advent of the more economical railroads began cutting away at their business from 1878 when the first line entered Arizona Territory.
John W. "Jack" Swilling was an early pioneer in the Arizona Territory. He is commonly credited as one of the original founders of the city of Phoenix, Arizona. Swilling also played an important role in the opening of the central Arizona highlands to white settlement. His discoveries resulted in a gold rush to the region, and this in turn led to the establishment of Arizona's first territorial capital at the mining town of Prescott.

The Trans-Mississippi Theater of the American Civil War consists of the major military operations west of the Mississippi River. The area is often thought of as excluding the states and territories bordering the Pacific Ocean, which formed the Pacific Coast Theater of the American Civil War (1861–1865).

The Whipple Expedition (1853–1854) was led by Lieutenant Amiel Weeks Whipple and tasked with conducting a survey from Fort Smith, Arkansas, to Los Angeles, California, along the 35th parallel north. The expedition lasted for nine months and traveled 1,800 miles (2,900 km).

The Wickenburg Massacre was the November 5, 1871, murder of six stagecoach passengers en route westbound from Wickenburg, Arizona Territory, headed for San Bernardino, California, on the La Paz road.