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Gavrillo Princip, a member of the Serbian terrorist group Black Hand, assassinated Archduke Ferdinand of of Austria-Hungary.
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Austria-Hungary declares war on Serbia out of revenge for the Archduke's murder.
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Germany declares war on Russia.
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Germany declares war on France
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Great Britain declares war on Germany
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Germany declares war on Belgium
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Austria-Hungary declares war on Russia
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Serbia declares war on Germany.
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France and Great Britain declares war on Austria-Hungary. Britain declares first, and France stands by as their ally.
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Russia declares war on Ottoman Empire for being sneak attacked by them in the Black Sea. After WWI ends, the Ottoman Empire becomes the country of Turkey.
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Great Britain and France declares war on the Ottoman Empire. After WWI ends, the Ottoman Empire becomes the country of Turkey.
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British passenger ship S.S Lusitania sunk by German U-Boat attack.
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Italy declares war on Austria-Hungary
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Italy declares war on Ottoman Empire (Turkey).
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Both Bulgaria and Serbia declares war on each other's country.
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Russia and Italy both declares war on Bulgaria
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Italy declares war on Germany.
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Zimmermann Telegram is sent from one German official to another, but is intercepted by a British spy, and sent to the US government. It called for Mexico to fight against the US in exchange for gaining land lost in the Spanish-American War.
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President Woodrow Wilson gives his message to Congress, asking them for permission to declare war with Germany.
It is there that he makes his famous saying: "The world must be made safe for democracy". -
United States of America declares war on Germany.
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United States of America declares war on Austria-Hungary
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THE_END!
