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The single event that started a chain of other events that led to World War 1 was the assassination of Archduke Ferdinand. This event took place in June of 1914. Archduke Ferdinand was the heir to the Austro-Hungarian throne.

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โˆ™ 2014-08-21 22:52:45
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World War 1

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Q: What single event started World War 1?
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It was the assasination of archduke franz Ferdinand that directly started world war 1

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The assassination of Archduke Ferdinand.

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