White settlement in Sublette County, Wyo. traces its roots to the late 1870s, when cattlemen brought herds to the pastures where North, Middle and Piney Creeks join the Green River. The town of Big Piney was incorporated there in 1913. The next year, neighboring Marbleton was incorporated a mile away, on higher ground on the bench above Piney Creek. Every effort to combine the two towns has failed, and they continue to maintain separate governments though they share most other services. The energy industry is now the major employer in both communities. Big Piney registered a population of 552 in the 2010 census, and Marbleton, 1,094.

The scenic Bighorn Basin and world-class fishing opportunities on the Bighorn River have made Big Horn County, Wyo., a tourist destination, but the area is also rich in oil and natural gas—and history. People have lived in the area since ancient times, as evidenced by the Medicine Wheel near the county’s northern corer. Ranch families still raise cattle and sheep, and farm families still raise sugar beets as they have for more than a century.

From 1942 through most of 1945, about 10,000 Japanese-Americans from the West Coast of United States lived behind barbed wire in tarpaper barracks at the Heart Mountain Relocation Center between Cody and Powell, Wyo. in Park County—one of ten such camps around the nation during World War II. The center was briefly Wyoming’s third-largest town. When hundreds of young men in the camp were drafted into the U.S. military, 63 resisted, feeling they had been denied their constitutional rights. They and seven more leaders of the group were sentenced to federal prison. In the 1980s, Congress passed a law granting an apology and $20,000 to every survivor of the camps.

Billy Owen never saw a railroad until he was eight years old. His mother had told him about railroads. But in his mind as he traveled east by wagon train across Wyoming in the spring of 1868, he had imagined railroad wheels that looked something like wagon wheels. They rolled in grooves. Each groove was made by two rails. That meant it took four rails, as he imagined it, to make a track.

The Casper Army Air Base was built quickly in 1942 to train bomber crews for World War II combat. The facility trained more than 16,000 men before the end of the war. Its population grew to a third of the size of Casper’s, bringing prosperity and a lively social life to the town. The base closed in 1945, when the war ended.

Created in 1868 before Wyoming was even a territory, Albany County and its vast plains are still good for livestock grazing. Thanks to the Union Pacific Railroad and early gold and copper mining, however, the county was industrial in its earliest times. Laramie, the county seat, was chosen as the site of the University of Wyoming in 1886, and the university stabilizes the town’s economic and cultural life.

German-American landscape artist Albert Bierstadt captured a transformative time in American history. His travels through Wyoming and the West gave Bierstadt a one-of-a-kind perspective for painting his best-known works in the 1850s and 1860s, and his grandiose landscapes and their idealized, pristine panoramas have sparked the imagination of generations.

Alcova Dam, a Bureau of Reclamation project, was completed in 1937. The reservoir opened in 1938 and a power plant was completed in 1955. The $20 million dam project didn’t achieve the high expectations of immense wealth that were forecast at the time of its inception, but continues to provide irrigation water for farmers and ranchers and generates hydropower for the area. Alcova Reservoir offers fishing, boating, camping and swimming opportunities for visitors.

Alonzo Clark was elected to the office Secretary of State in November of 1926 and served two terms. He took office as acting Governor to complete the first half of the late Governor Emerson's term.

In 1871, Amalia Post of Cheyenne, Wyoming Territory, became one of the first women to serve on a jury in the United States. Soon, she began advocating for women’s rights on a national level. She was an independent businesswoman from the time her first husband abandoned her in Denver in the early 1860s, through her marriage to her second husband, Cheyenne banker and politician Morton Post and up to the time of her death in 1897.