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  Archduke Franz Ferdinand assassinated
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  The time period for World War I.
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  Two major countries declare war.
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  Two major countries declare war.
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  They say they won't join in on the war.
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  major naval battle
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  when tanks are introduced in battle
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  The US joins the war after declaring to stay neutral.
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  peace between russia and central powers
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  The ending of WWI.
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  Starts WWII in the Pacific
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  Time period for World War II.
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  start of WWII in Europe
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  This will spark major war.
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  Another country joins the war.
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  Three major countries signing a contract.
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  Sparks US to join the war.
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  US officially enters WWII.
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  Dec. 11-13th. US at war with more countries in WWII.
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  This will anger Germany.
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  Anglo-American bombers could hit targets in eastern Germany for the first time. Important cause they could attack now.
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  This will continue the US in the war.
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  This will be Russia's final attack on Germany.
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  The leader of Germany is no longer alive.
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  Germany ending war with the allies.
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  Germany ends war with Russia.
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  The ending of WWII.
