Sojourner Truth addresses 1st Black Women’s Rights convention - 1851
The Sheet Metal Workers International Association (SMWIA) is founded in Toledo, Ohio as the Tin, Sheet Iron and Cornice Workers’ International Association - 1888
United Mine Workers of America founded in Columbus, Ohio. The union’s constitution barred racial, religious and ethnic discrimination - 1890
200 miners are killed in an horrific explosion at the Harwick mine in Cheswick, Pa., Allegheny County. Many of the dead lay entombed in the sealed mine to this day - 1904
The Supreme Court upholds “Yellow Dog” employment contracts, which forbid membership in labor unions. Yellow Dog contracts remained legal until 1932 - 1915
16,000 textile workers strike in Passaic, N.J. - 1926
http://www.unionist.com/today-in-labor-history