July 21 - A day after bloody rioting in Baltimore from Baltimore and Ohio Railroad workers and the deaths of 9 rail workers at the hands of the Maryland militia, workers in Pittsburgh stage a sympathy strike that is met with an assault by the state militia - Pittsburgh then erupts into widespread rioting.
August 17 - Arizona blacksmith F.P. Cahill is fatally wounded by Billy the Kid. Cahill will die the next day, becoming the first person killed by the Kid.
November 21 - Thomas Edison announces his invention of the Phonograph, a machine that can record sound (this is considered to be Edison's first great invention) (Edison demonstrated the device for the first time on November 29).