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Liberty Hill site

California historic landmark

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionJul 21, 2026
Entity authorityQ85776520 ↗
Source-derived summary

Liberty Hill site in San Pedro, Los Angeles, California was the site of the 1923 strike by the Marine Transport Workers Industrial Union 510 a part of the Industrial Workers of the World (IWW). The strike was called to draw attention to the worker's low wages and poor working conditions. It was also to draw attention to some union activists that had been arrested and lockup for violating the California Criminal Syndicalism Act passed on April 30, 1919, by Governor William Stephens, which criminalized syndicalism. The strike tied up 90 ships in Port of Los Angeles San Pedro. The Liberty Hill site was designated a California Historic Landmark (No. 1021) on March 3, 1997.

On May 15, 1923, writer Upton Sinclair spoke to approximately 3,000 striking longshoremen at Liberty Hill. Sinclair used street theater to highlight ongoing suppression of freedom of speech by the LAPD, Sinclair began his address by reading the Bill of Rights. Within moments, he was arrested. The strike did not achieve its goal, but did start a movement that found success in the 1930s, the Congress of Industrial Organizations.

Editorial summary

The public source identifies “Liberty Hill site” as california historic landmark. This brief keeps that definition visible, then builds a research path around Liberty, Hill and site.

Editorial reviewA dependable orientation record for establishing vocabulary, names and a first evidence trail. The current lead gives the account dated anchors—1923, 1919, 1021, 1997—that can be checked directly. The selected authority fields contribute no independent date. Its value is orientation rather than verdict, with Liberty, Hill and site providing the first useful test.
Editorial analysis

Why this record matters

A short description can identify a subject without explaining its stakes. For “Liberty Hill site”, the useful work is to connect “california historic landmark” to the records capable of establishing context and consequence.

Evidence profile

The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Jul 21, 2026. The linked authority identifier is Q85776520. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1923, 1919, 1021 and 1997.

Critical limits

The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

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Source & attribution

This entry incorporates text from “Liberty Hill site” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.