Pinedale, Wyo. was founded in 1904, incorporated in 1912 and became seat of brand-new Sublette County in western Wyoming in 1921, when the town still boasted only about 100 people. Despite its isolation, the town survived well through the 20th century on ranching and tourism. It began to change more quickly in the early 1990s, as development sped up in the nearby Pinedale Anticline and Jonah natural gas fields. Today, with more than 2,000 people, the town works hard to keep its traditions while dealing with steady, industrial growth.

Two battles on July 26, 1865 near Platte Bridge Station near present-day Casper, Wyo., are best understood in the context of tribal response to the Sand Creek Massacre the previous November. Twenty-eight U.S. troops were killed that day including Lt. Caspar Collins, for whom Fort Caspar and the town of Casper were later named.

Robert Stuart and partners and employees of the fur magnate John Jacob Astor, traveling east in 1812 from the Oregon coast to St. Louis, crossed “a handsome low gap” in the Rocky Mountains in October of that year, after receiving a tip months before about its existence from a Shoshone guide. This marked the discovery by European Americans of South Pass, destined in coming decades to become the main route of American expansion to the West.

One of Wyoming’s early large-scale irrigation projects dates to the 1880s in what’s now Platte County, Wyoming and the county, organized in early 1913, still is perhaps best known for its reservoirs and recreation areas. The Oregon Trail ruts and Register Cliff near Guernsey serve as reminders of the pioneer heritage of the area and a coal-fired power plant near Wheatland provides jobs and economic stability.

In November 1876, about 700 cavalry and 400 Indian scouts led by Col. Ranald Mackenzie, burned the main village of the Northern Cheyenne to the ground near the Red Fork of Powder River about 20 miles west of present Kaycee, Wyo. Seven soldiers were killed and about 40 Cheyenne, but the economic and cultural loss to the tribe was devastating. The Northern Cheyenne surrendered to government authorities the following spring.

Largely forgotten today is the stiff local resistance that arose in Jackson Hole, Wyoming, to the creation and later the expansion of a national park there. The story covers 31 years of controversy, and includes a Rockefeller, a movie actor and a group of armed ranchers trailing cattle illegally across a national monument, and some of the most beautiful scenery in North America.

Wyoming gets its name from a green valley in northeast Pennsylvania originally purchased from the Iroquois by a Connecticut land company. An Ohio congressman in 1865 first proposed the name—but later, after he saw our dry, wide plains, he wasn’t so sure he’d had the right idea.

Milward Simpson also served on the University of Wyoming Board of Trustees from 1939 until 1954 when he was elected Governor.

Since prehistoric times, people’s lifestyles in what became Natrona County have depended on their livelihoods. Casper was founded in 1888, and county was formed in 1890, shortly before Wyoming became a state. First cattle, then sheep and after 1910, the oil and refining business dominated. An Army Air Corps training base near Casper brought another boost in World War II. Casper College was founded in 1945. Since then, the county has continued to ride the booms and busts of the energy business, but with cultural, health-care and education opportunities growing all the while.

Nellie Tayloe Ross won an election to replace her late husband and became the first woman governor in the United States. Governor Ross survived several challenges to her authority, some of which started with her first days in office.