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started WW1
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led to the assination of Ferdinand
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submarine warfare against the United Kingdom which had implemented a naval blockade.
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was fought in great confusion owing to a fog of smoke from the stacks and guns
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started sinking ships
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German ambassador to Mexico proposing a Mexican-German alliance in the case of war between the United States and Germany
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There were rioting and strikes in St.Petersburg.
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killed an estimated 50 million people 1/5 of the world's population was attacked by this deadly virus
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the armistice that ended fighting on land, sea and air in World War I
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Ended russions priciptation in the war
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others signed with differnt treaties
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serious of provacations