1670. King Charles II grants a charter to the Hudson's Bay Company, often regarded as the oldest corporation in the world. The company's reach would stretch all the way from the Arctic well down into what is now the Western United States.
In the 18th Century the Hudson's Bay Company was nearly a country unto itself, operating in its vast domain, and existing as a unique wilderness based corporate entity, with the product of its endeavors ultimately going to market in the United Kingdom, and with British products with frontier utility returning to the North American West. It had its own flag and forts. While it is commonly seemingly assumed that the company was mostly a Canadian enterprise, the assumption if false as its network of traders covered vast distances, stretching as far south as Texas and as far north as Alaska. It's notable that when the Corps of Discovery finally made the Pacific, they were met there by the presence of a Hudson's Bay Company fort, the entire expanse of the "Lewis and Clark" journey covering territory already known and exploited by the Hudson's Bay Company. Likewise, the first U.S. expedition up the Yukon River after the acquisition of Alaska was met by the arrival of the party at Ft. Yukon, a Hudson's Bay Company fort that was occupying territory in Russian Alaska.
Canadian depiction of activities, at Christmas, at a Hudson's Bay Company post.
1869 The Golden Spike driven at Promontory Point.
1888 Charles Dickens, Jr. delivered an address in Cheyenne. Attribution: Wyoming State Historical Society.
1898 Wyoming National Guard companies activated for service in the Philippines ordered to report to Camp Richards near Cheyenne. Attribution: On This Day.
1900 First party of settlers, Mormon pioneers, settles in Crowley.
1905 Construction began on the rail line from Casper to Lander. Attribution: Wyoming State Historical Society.
1933 Gillette requested Federal assistance in putting out long burning coal fires. Attribution: Wyoming State Historical Society.
1974 Wyoming, Rhode Island, added to the National Registry of Historic Places.