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World War 1

  • Archduke Francis Ferdinand is assassinated

    Archduke Francis Ferdinand is assassinated

  • Austria-Hungary declares war on Serbia, beginning World War I.

  • A secret alliance was signed between Germany and the Ottoman Empire. German troops occupied Luxembourg in accordance with its Schlieffen Plan.

    A secret alliance was signed between Germany and the Ottoman Empire. German troops occupied Luxembourg in accordance with its Schlieffen Plan.

  • The first British troops land in France

    The first British troops land in France

  • Austria-Hungary invades Russia.

    Austria-Hungary invades Russia.

  • Allied forces halt German advance into France during First Battle of the Marne.

    Allied forces halt German advance into France during First Battle of the Marne.

  • Germany begins naval blockade of Great Britain.

    Germany begins naval blockade of Great Britain.

  • Allied forces land on the Gallipoli Peninsula of the Ottoman Empire

    Allied forces land on the Gallipoli Peninsula of the Ottoman Empire

  • German submarine sinks the passenger liner Lusitania during crossing from New York to Liverpool, England, killing 128 Americans.

    German submarine sinks the passenger liner Lusitania during crossing from New York to Liverpool, England, killing 128 Americans.

  • Italy declares war on Austria-Hungary

    Italy declares war on Austria-Hungary

  • Germany begins the attack on Verdun.

    Germany begins the attack on Verdun.

  • Naval Battle of Jutland takes place between British and German fleets.

    Naval Battle of Jutland takes place between British and German fleets.

  • Allied offensive begins the Battle of the Somme

    Allied offensive begins the Battle of the Somme

  • Battle of Verdun ends with 550,000 French and 450,000 German casualties.

    Battle of Verdun ends with 550,000 French and 450,000 German casualties.

  • Germany returns to unrestricted submarine warfare halted after the sinking of the Lusitania.

    Germany returns to unrestricted submarine warfare halted after the sinking of the Lusitania.

  • United States severs diplomatic relations with Germany.

    United States severs diplomatic relations with Germany.

  • The United States declares war on Germany.

    The United States declares war on Germany.

  • General John J. Pershing, newly selected commander of the American Expeditionary Forces, arrives in England with his staff

    General John J. Pershing, newly selected commander of the American Expeditionary Forces, arrives in England with his staff

  • American combat forces arrive in France.

    American combat forces arrive in France.

  • Russia signs armistice with Germany.

    Russia signs armistice with Germany.

  • President Woodrow Wilson presents to Congress his outline of Fourteen Points required for peace.

    President Woodrow Wilson presents to Congress his outline of Fourteen Points required for peace.

  • Germany begins its final offensive of the war.

    Germany begins its final offensive of the war.

  • United States forces are victorious in the Battle of Cantigny, the first independent American operation.

    United States forces are victorious in the Battle of Cantigny, the first independent American operation.

  • American forces stop German attempt to cross the Marne River at Chateau-Thierry.

    American forces stop German attempt to cross the Marne River at Chateau-Thierry.

  • American First Army attacks St. Mihiel salient.

    American First Army attacks St. Mihiel salient.

  • British and American forces enter Germany.

    British and American forces enter Germany.

  • Peace conference begins at Paris.

    Peace conference begins at Paris.

  • Treaty of Versailles takes effect.

    Treaty of Versailles takes effect.

  • United States signs separate peace treaties with Germany, Austria, and Hungary.

    United States signs separate peace treaties with Germany, Austria, and Hungary.