Museum or archive
Photographs Regarding the 1916 Preparedness Day Parade Bombing, 1916–1933
The Bancroft Library, University of California, Berkeley
Cross-File evidence ledger
Where this source supports the record
Each entry separates the File’s editorial relevance note from its exact, section-level claims. A bibliography link without a direct claim is labeled plainly.
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Historic crimes & investigations · 22 July 1916Open File evidence →
The Preparedness Day Bombing and the Mooney Case
West side of Steuart Street just south of Market Street · United States
Why editors use it hereFinding aid to a university archival collection documenting the bombing, defendants, witnesses, and later campaign.
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Quick read
At 2:06 p.m.
Reviewed 24 July 2026 -
Trigger and conditions
A bomb concealed in a suitcase detonated near Steuart and Market Streets about half an hour after the procession began.
Reviewed 24 July 2026 -
Uncertainty
The blast's time, location, and casualties are well documented.
Reviewed 24 July 2026 -
Why it matters
The bombing joins two histories that should not be collapsed into one: ten people were killed by an unresolved act of violence, and other people were then subjected to a deeply unreliable prosecution.
Reviewed 24 July 2026
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Quick read