The United Mine Workers of America is founded in Columbus, OH with the merger of the Knights of Labor Trade Assembly No. 135 and the National progressive Miners Union. The union’s constitution barred racial, religious and ethnic discrimination - 1890

National Association of Letter Carriers formed - 1889

Two strikers and a bystander are killed, 30 seriously wounded by police in Duluth, Minn. The workers, mostly immigrants building the city’s streets and sewers, struck after contractors reneged on a promise to pay $1.75 a day - 1889