1923 San Pedro maritime strike
California labor action / From Wikipedia, the free encyclopedia
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The 1923 San Pedro maritime strike (also known as the Liberty Hill strike) was, at the time, the biggest challenge to the dominance of the open shop culture of Los Angeles, California until the rise of the Congress of Industrial Organizations in the 1930s.
The strike was led by members of the Industrial Workers of the World (IWW, or the "Wobblies") which bottled up shipping in the harbor. One of the largest staged protests during the strike was led by author Upton Sinclair on a small plot of land called Liberty Hill where he was arrested for reciting the First Amendment. It was eventually crushed by a combination of injunctions, mass arrests and vigilantism by both the police force and the Ku Klux Klan. There would not be another waterfront strike of this magnitude until the 1934 West Coast Waterfront Strike.