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Updated:Apr 23, 2026
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Haymarket Affair and the International Campaign for the 8-Hour Day (1886–1919)

Haymarket Affair and the International Campaign for the 8-Hour Day (1886–1919)

  1. Nationwide May Day strikes demand eight-hour day

    Labels: May Day, Chicago
  2. McCormick strike violence sparks Haymarket rally call

    Labels: McCormick Strike, Chicago
  3. Bay View massacre shows wider eight-hour unrest

    Labels: Bay View, Milwaukee
  4. Haymarket trial begins amid intense public pressure

    Labels: Haymarket Trial, Chicago courthouse
  5. Jury convicts eight defendants in Haymarket case

    Labels: Haymarket Verdict, convictions
  6. Second International calls May 1, 1890 labor mobilization

    Labels: Second International, Paris Congress
  7. First International Workers’ Day demonstrations held

    Labels: International Workers', May Day
  8. Pullman Strike shows federal power against national labor actions

    Labels: Pullman Strike, federal intervention
  9. Railroad unions organize for federal eight-hour standard

    Labels: Railroad Unions, brotherhoods
  10. Adamson Act establishes eight-hour day for rail workers

    Labels: Adamson Act, Congress
  11. Supreme Court upholds Adamson Act in Wilson v. New

    Labels: Wilson v, Supreme Court
  12. ILO adopts first international eight-hour-day convention

    Labels: ILO Convention, International Labour