his 1809 poem "Gertrude of Wyoming", inspired by the Battle of Wyoming in the American Revolutionary War. The name ultimately derives from the Lenape Munsee word ("at the big river flat"). After the Union Pacific Railroad reached Cheyenne in 1867, population growth was stimulated. The federal government established the Wyoming Territory on July 25, 1868. Lacking significant deposits of gold and silver, unlike mineral-rich Colorado, Wyoming did not have such a population boom. But South Pass City had a short-lived boom after the Carissa Mine began producing gold in 1867. Copper was mined in some areas between the Sierra Madre Mountains and the Snowy Range near Grand Encampment. Once government-sponsored expeditions to the Yellowstone country began, Colter's and Bridger's descriptions of the region's landscape were confirmed. In 1872, Yellowstone National Park was created as the world's first, to protect this area. Nearly all of the park lies within the northwestern corner of Wyoming. On December 10, 1869, territorial Governor John Allen Campbell extended the right to vote to women, making Wyoming the first territory to do so. It kept that franchise when it established its state constitution. Women first served on juries in Wyoming (Laramie in 1870). Wyoming was also a pioneer in welcoming women into electoral politics. It had the first female court bailiff (Mary Atkinson, Laramie, in 1870), and the first female justice of the peace in the country (Esther Hobart Morris, South Pass City, in 1870). In 1924, Wyoming was the first state to elect a female governor, Nellie Tayloe Ross, who took office in January 1925. Due to its civil-rights history, one of Wyoming's state nicknames is "The Equality State", and the official state motto is "Equal Rights". Wyoming's constitution included women's suffrage and a pioneering article on water rights. Congress admitted Wyoming into the Union as the 44th state on July 10, 1890. Wyoming was the location of the Johnson County War of 1892, which erupted between competing groups of cattle ranchers. The passage of the Homestead Act led to an influx of small ranchers. A range war broke out when either or both of the groups chose violent conflict over commercial competition in the use of the public land. Geography Climate Wyoming's climate is generally semi-arid and continental (Köppen climate classification BSk) and is drier and windier in comparison to most of the United States with greater temperature extremes. Much of this is due