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INPRIMATU
24,000 workers from the Paterson silk workshop started a strike in the United States for eight hours

24,000 Paterson silk workers started a strike in New Jersey (USA) calling for an improvement in the day and eight-hour conditions. For a few months there were major incidents and 1,850 workers were arrested by the police, including trade union representatives. After a harsh five-month crackdown, workers returned to work without achieving the goals, but the strike became a milestone in the struggle for workers to improve working conditions in the twentieth century.

Wikipedia - 1913 Paterson silk strike.