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Archduke Franz Ferdinand were assassinated by Serbian nationalist Gavrilo Princip
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Period: to
countries started to declared war on each other
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The Battle of Tannenberg begins
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The First Battle of the Marne begins
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Battle of Ypres begins
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- The Second Battle of Ypres begins. It is during this battle that the Germans first use poison gas.
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The Battle of Gallipoli begins
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The Battle of Verdun begins. The Battle of Verdun was the longest battle of World War I and was one of the bloodiest
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The Battle of Jutland, the major naval battle of the war, begins
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The Battle of the Somme begins. During the Battle of the Somme, tanks are first introduced into battle
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Germany sends the secret Zimmerman Telegram to Mexico in an effort to entice Mexico to join the war. The British intercept and decipher the coded message.
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The United States declares war on Germany.
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The Battle of Passchendaele begins.
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- Russia signs the Treaty of Brest Litovsk, which is a peace treaty between Russia and the Central Powers.
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The Second Battle of the Marne begins.
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Germany signs the armistice at Compiegne, France. Fighting ends on the 11th hour of the 11th day of the 11th month.
