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One of the most interesting territories to reach statehood was the state of Wyoming. In the beginning Spain, France and Britain all claimed parts of Wyoming. The United States acquired the area piecemeal in several different ways. Through the Louisiana Purchase in 1803 a portion of Wyoming became the property of the United States. Another portion of the territory was gained through the Treaty of 1819 with Spain. The cession by republic of Texas in 1836 gained yet another portion of the state and the agreement with Britain setting the Northern boundary in 1846 included a portion of the state. Finally, as a result of the Mexican War the United States gained half a million square miles of territory through the Treaty of Guadalupe Hidalgo in 1848. This included parts of Wyoming.
Early development in the Wyoming territory were linked with fur trade and westward migrations. Mountain men came to the region and in 1832 the first travelers entered the territory through the South Pass of the Oregon Trail. Fur trading post were established at Fort Laramie and Fort William in 1834. As the fur trading business expanded, fur trading post were established at Fort Bridger in 1843. Indian troubles were severe in the 1860's and 1870's especially in the Sioux controlled Powder River Valley. The discover of gold in southern Wyoming in 1867 brought the first big influx of settlers to the territory. Further settlement followed the completion of the Union Pacific Rail Road in 1868 and Wyoming became a territory in 1868. Wyoming pioneered in political equality by granting vote to women in 1869 and was admitted as a state that same year.
With Indian threat finally removed in the 1870's the open ranges attracted cattle raisers through the late 19th century. This was marked by feuds between cattlemen and sheep men. By 1920 Wyoming ranked fourth in the United States in production of crude oil due to an area near Casper. This area was set aside by President Wilson in 1915 as a naval oil reserve. It was transferred to the Department of the Interior in 1921. In 1922, A. B. Fall, the Secretary of the Interior leased the Teapot Dome fields without competitive bidding. A Senate investigation led by Senator T. J. Walsh led to criminal prosecutions, bringing notoriety to a number of prominent officials. Wyoming was aided by reclamation and conservation and establishment of national parks and discovery of Uranium. The Capitol of Wyoming is Cheyenne. The State Bird is the Western Meadowlark and the State Flower is the Indian Paintbrush.