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A member of Austrian royalty is assassinated by Gavrillo Princip, a member for the Black Hand.
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A month after the Archduke's assassination, Austria-Hungary declares war on Serbia.
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Germany declares war on Russia, then France just two days after.
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Britain jumps to defend its allies.
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British ship Lusitania is sunken by German U-boats. Both British and United States citizens are killed.
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Germany agrees to cease unrestricted submarine warfare in order to keep the United States out of Europe.
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Germany's attempt to make Mexico go to war with the United States. Interc epted by Great Britain.
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After the sinking of 3 USA merchant ships, President Wilson decides it's time to go to war againt Germany.
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After the use of the Convoy System, US troops arrive in France to aid in the war.
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American advances cause Germany to retreat from Paris.
