Today is Cinco de Mayo, I.E., The 5th of May. The day, celebrating the first battle of La Puebla in 1862 in which Mexican forces defeated a French force during Mexico's efforts to oust French supported Maximilian. The day is not widely celebrated in Mexico, which recognizes a different day as its independence day from Spain, but it has become widely celebrated in the United States.
1877. Sitting Bull and his followers cross in to Canada.
1891 Green River, WY incorporated. Attribution: On This Day.
1893 Panic at the New York Stock Exchange announces the arrival a severe depression in the United States.
1904 Cy Young pitches the first perfect game in modern major league baseball.
1908 First meeting of the Wyoming Farmers Congress took place in Cheyenne. Attribution: On This Day.
1928 The Gillette library opened. Today this building is the George Amos Memorial Building, which is located next to the Campbell County Courthouse, and which is used for meetings.
George Amos Building, formerly the George Hopper Library, now a meeting building in Campbell County. the memorial is a Campbell County War Memorial.
1943. Cannons located on the state capitol grounds in Cheyenne, Wyoming were scrapped as part of a scrap drive. The scrapping of Civil War cannons was very common in this period and was largely symbolic. In terms of their contribution to iron needs for the war, the actual impact was none existent and in retrospect the scrapping of the Civil War cannons can be viewed as a bit of a tragedy.
1988 Jensen Ranch in Sublette County added to the National Registry of Historic Places.