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What was the cause of World War 1

1 investigation · 5 maps · 481 claims · Last updated Oct 22, 2026

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What was the cause of World War 1: 1 public investigation and 481 claims.

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Last generated Oct 22, 2026, 4:37 PM by a member

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Compared Oct 22, 2026, 4:37 PM

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  • Primary parish registers and civil documentation record conflicting birth dates for Gavrilo Princip, producing competing historical claims over whether he was legally 19 or 20 at the time of the assassination.

    M2What was the cause of World War 1

    C0001Archduke Franz Ferdinand assassinationKnown correct

    Archduke Franz Ferdinand, the heir presumptive to the Austro-Hungarian throne, and his wife Sophie, Duchess of Hohenberg, were assassinated in Sarajevo on June 28, 1914, by Gavrilo Princip, a 19-year-old Bosnian Serb.

    InferredMedium significanceClaude

    M3Imperial Capitalist Competition Drove the Outbreak of World War I

    C0018Princip's age disputed

    Some secondary sources still suggest the possibility that Gavrilo Princip might have already been 20 years old under one interpretation of his birth records.

    InferredMedium significanceGrok