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Early history
The first occupants of Wyoming were prehistoric hunters and gatherers who probably arrived from Siberia through Alaska more than 20,000 years ago. The total number of these peoples was never large, because they were highly dependent upon local game populations. By the time the first well-documented visits by “white” explorers to Wyoming occurred, the state’s population likely did not exceed 10,000. The Shoshone were the largest group in Wyoming at the beginning of the 19th century, but there were also smaller numbers of Arapaho, Crow, Cheyenne, Atsina, Arikara, Nez Percé, Ute, and Oglala and Brulé Dakota (Sioux).
The first known explorers to enter Wyoming were the French Canadian brothers François and Louis-Joseph, sons of Pierre Gaultier de Varennes, sieur de la Vérendrye. The brothers visited the northeastern corner of the state in 1743 while unsuccessfully searching for a route to the Pacific Ocean. Although the Lewis and Clark Expedition (1804–06) missed Wyoming by 60 miles (97 km), a member of the group, John Colter, broke away from the main party and trapped in northern Wyoming for some time; the official journal of the expedition includes Colter’s route and descriptions of the Jackson Hole and Yellowstone Park areas.
Fur trade and the Union Pacific Railroad
The early explorers were followed by small numbers of fur traders. Although there were likely never more than 500 traders in Wyoming at any given time, the state’s economy between 1825 and 1840 was heavily dependent on the activities of famous trappers and traders, including Jim Bridger, William Sublette, Jedediah Smith, and Thomas Fitzpatrick.
The number of people entering the Wyoming area increased with the westward movement of the U.S. population. After the discovery of the South Pass through the Rocky Mountains, as many as 400,000 emigrants crossed Wyoming between 1841 and 1868 on the Oregon, Overland, Mormon, Bozeman, and Bridger trails leading to what are now the present-day states of Oregon, Washington, Montana, Utah, and California. It is estimated that in 1850 alone as many as 55,000 crossed the future state. Pony Express riders, including William F. Cody, better known as Buffalo Bill, carried the mail across Wyoming between April 1860 and October 1861. The military posts of Fort Laramie and Fort Phil Kearny were established during this period.
In November 1867 the first train of the Union Pacific Railroad reached Cheyenne and made the state accessible to settlers and visitors. Also that year Fort D.A. Russell (now Francis E. Warren Air Force Base) was built on the branch of the South Platte River, 3 miles (5 km) west of present-day Cheyenne. Cheyenne grew from a handful of people to more than 6,000 in the first year, though the town consisted largely of tents and shacks, with a limited number of commercial buildings. This rapid population growth continued in southern Wyoming as the Union Pacific tracks continued across the state, finally entering Utah in 1868. The building of the railroad focused attention on the West, and the Wyoming Territory was created on July 25, 1868.
Statehood
The state’s constitution was approved by a vote of the territorial population on Nov. 5, 1889, although Wyoming was not admitted to the Union until 1890. Wyoming’s constitution was the first in the world to grant full voting rights to women, as well as to allow them to hold public office. Wyoming also became the first state to elect a woman governor when Nellie Tayloe Ross won the position in 1924. Because of these developments Wyoming has been called the Equality State.
In the years preceding statehood, Wyoming developed its thriving cattle industry, serving as a terminus for cattle drives from Texas. The state’s immense rangelands fostered the initiation of the cowboy era that was chronicled in Owen Wister’s The Virginian (1902), based on his experience in turn-of-the-century Wyoming. This era was marked by violence on the range between cattlemen, homesteaders, and sheepherders that continued well after 1900; such conflicts over the control of resources and land occurred throughout the American West.