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Assassination of Archduke Franz Ferdinand and his wife,Sophie
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Austria-Hungary declares war on Serbia
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Germany declares war on Russia
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Germany declares war on France
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First British troops land in France
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Great Britain and France declare war on Austria-Hungary.Serbia is invaded by Austria-Hungary
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the Battle of Mons, British vs German
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The Ottoman Empire enters the war after Russia declared war on the Empire
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Germany declared the waters about the British Isles a war zone
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the Armenian genocide began
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Italy signs the Treaty of London, committing itself to enter World War I on the side of the Allies.
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Lusitania sunken by German submarine
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Battle of Somme, British empire and France vs German Empire
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HMHS Britannic sank after hitting a mine killing 30 people
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Ottoman Empire prevailed over a joint British and French operation to capture Constantinople
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Zimmermann telegram
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the United States formally declared war against Germany
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The first American troops land in France and Greece declares war on the Central Powers
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China declared war on Germany
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U.S. President Woodrow Wilson outlined the United States' war aims in a speech given to Congress
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First recorded case of Spanish flu at Funston Army Camp, Kanas; start of worldwide pandemic killing 50-100 million
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Armistice Day
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Paris Peace Conference
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Germany signed the Treaty of Versailles, officially ending its involvement in World War I
