Trained in Paris and Rome, Baltimore artist Alfred Jacob Miller attended the 1837 fur-trade rendezvous in what’s now western Wyoming. Miller sketched and painted all aspects of the fur trade for his patron, the Scottish adventurer William Drummond Stewart, and later reworked much of this material into oil paintings for a wider audience.

Rural electrification brought welcome changes to farms and ranches throughout Wyoming in the 1930s and 1940s, despite numerous early challenges—including opposition from existing utilities— that threatened to thwart the effort.

Natrona County’s Salt Creek Field is best known of Wyoming’s early oil fields, but five others—two in Park County and one each in Hot Springs, Niobrara and Converse counties—played important roles in the state’s 20th century transformation from an agricultural to an industrial economy.

The Welsh-born Episcopal priest John Roberts arrived in 1883 at Fort Washakie on what’s now the Wind River Indian Reservation in Wyoming, became a friend of the Shoshone chief Washakie, and served the Shoshone and Arapaho people with a loving paternalism well into his old age. John Roberts died in 1949.

On September 2, 1885, long-simmering tensions between white and Chinese coal miners in Rock Springs, Wyoming Territory, boiled over into a massacre in which whites murdered 28 Chinese, wounded 15 more, and looted and burned all 79 shacks and houses in Rock Springs’ Chinatown. Though the remaining Chinese miners wanted desperately to leave Wyoming, the Union Pacific Railroad, which owned the mines, refused to grant them railroad passes or the back pay owed them. The Chinese finally had no choice but to return to work, which kept wages low and the coal flowing from the mines.

On Aug. 2, 1867, a large force of Oglala Sioux attacked woodcutters near Fort Phil Kearny. Soldiers assigned to protect the woodcutters took cover behind a ring of wagon boxes. After the intense battle, both sides claimed victory, and estimates of the dead and wounded varied widely.

The Vore Buffalo Jump, a natural sinkhole where ancient tribes drove bison to butcher them, now lies adjacent to I-90 near Sundance, Wyo., and is open to the public during the summer.

Originally established as the Wyoming Insane Asylum by the Wyoming Territorial Legislature in 1886, the Wyoming State Hospital in Evanston opened in 1889 and operates today on the same site. The institution evolved and the campus was built according to trends in psychiatric thought and therapeutic practices. Notable among its superintendents was Dr. C.H. Solier, who ran the hospital from 1891 to 1930, and successfully deflected allegations of patient abuse in the 1920s.

Wyoming’s sheep business never had the fame or cachet of Wyoming’s cattle business, but at the turn of the last century sheep raising was more widespread and probably more lucrative. Cattlemen, however, reacted violently to sheepmen’s entry onto the public range, and for a time deadly raids by cattlemen on flocks, sheepdogs and sheepherders were chronic. A gradual decline in wool and lamb prices since the 1920s has left only about a twentieth as many sheep on Wyoming ranges now as there were in 1909.

A late-1960s Atomic Energy Commission plan to extract Wyoming natural gas with five underground nuclear explosions won strong initial support from the oil and gas industry and the federal government. Finally, however, the idea stalled, thanks to the emergence of more information on possible dangers, to Washington politics, and especially to intense local opposition in Sublette County, Wyo., where the devices were slated to be detonated.