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Archduke Franz Ferdinand of Austria, heir to the Austro-Hungarian throne and his wife Sophie, Duchess of Hohenberg were assassinated in Sarajevo on 28 June 1914. They were shot to death by Gavrilo Princip, a Bosnian student and member of the Serbian secret society "Black Hand".
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one month to the day after Archduke Franz Ferdinand of Austria and his wife were killed by a Serbian nationalist in Sarajevo, Austria-Hungary declares war on Serbia, effectively beginning the First World War.
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Great Britain declares war on Germany. The declaration is binding on all Dominions within the British Empire including Canada, Australia, New Zealand, India and South Africa. August 4, 1914 - The United States declares its neutrality.
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the German U-20 (submarine) sank the British ocean liner Lusitania. Approximately 1,200 civilians died; more than 100 were U.S. citizens.
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French passenger ship France IV was sunk in the Mediterranean Sea 85 nautical miles (157 km) southwest of Sardinia, Italy by German submarine SM U-38, with her crew surviving.
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in the darkest days of the Great War, a massive explosion rocked London's East End. Shockwaves could be felt in Essex, while the blast itself was heard as far away as Southampton and Norwich.
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the United States formally declared war against Germany and entered the conflict in Europe. Fighting since the summer of 1914, Britain, France, and Russia welcomed news that American troops and supplies would be directed toward the Allied war effort.
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battle of Mount Ortigara Shock troops with the Austro-Hungarian Army pushed 11 Italian divisions off the Mount Ortigara summit, regaining their important defensive position in Asiago, Italy. Italy suffered 23,000 casualties while Austria-Hungary sustained only 9,000 casualties.
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The Allied powers signed a ceasefire agreement with Germany at Compiégne, France, at 11:00 a.m. on November 11, 1918, bringing the war now known as World War I to a close. ... Between the world wars, November 11 was commemorated as Armistice Day in the United States, Great Britain, and France.
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Five years later, on June 28, 1919, Germany and the Allies signed the Treaty of Versailles, formally ending World War I and providing for the creation of the League of Nations.
