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Assassination of Archduke Franz Ferdinand
He was assassinated in Sarajevo, most likely by the Serbians. -
World War I Begins
Austria-Hungary declares war on Serbia. -
Australia Joins the War
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Battle of Ypres
German forces shock Allied soldiers along the Western Front by firing more than 150 tons of lethal chlorine gas against two French colonial divisions at Ypres in Belgium. -
The Battle of Gallipoli begins
The Allies launched their invasion of the Gallipoli Peninsula -
Sinking of the RMS Lusitania
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The Battle of Gallipoli ends
The British government authorized the evacuation to begin from Suvla Bay on December 7; the last troops left Helles on January 9, 1916. -
The Battle of Somme
British empire fights the German empire alongside the French Third Republic. -
The Zimmerman Telegram
British cryptographers deciphered a telegram from German Foreign Minister Arthur Zimmermann to the German Minister to Mexico, Heinrich von Eckhardt, offering United States territory to Mexico in return for joining the German cause. -
US Joins WW1
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Treaty of Brest Litovsk
Ended Russia's participation in WW1 -
The treaty of Versailles
The treaty forced Germany to surrender colonies in Africa, Asia and the Pacific