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Franz Ferdinand, Archduke of Austria, is assassinated with his wife, Sophia, in the country of Serbia, sparking the events of the Great War (World War I).
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Austria-Hungary declares war on Serbia on this day, a month after the Assassination of Franz Ferdinand
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A month after Franz Ferdinand was assassinated, Austria-Hungary declared War on Serbia.
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After Austria-Hungary declares war on Serbia, Russia mobilizes their Army and is dragged in to the war due to their alliance with Serbia.
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After News of Russia mobilizing their army to attack Austria-Hungary hits, Germany is forced to order them to stop their attack plan, as they have an alliance with Austria-Hungary.
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France was dragged unwillingly into the Great War because of their strong alliance with Russia, after news of Germany's demanding Russia leave Austria-Hugary alone. Also, Germany declared War on France the same day, assuming they would attempt to defend Russia, and went forth with the Schlieffen Plan.
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After the Shlieffen Plan by Germany, Belgium was ripped apart by the German army to reach France, and because of the Treaty of London, Britain Entered the Great War.
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After a secret deal with the German Empire, the Ottoman Empire Joins the Great War on October 28th, 1914, after the Russian Black Sea Ports are bombed.
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Although technically sided with the Central Powers, Italy joined the Allies to get land from Austria-Hugary on May 23rd, 1915.
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After much conisderation, Bulgaria joined the Central Powers to keep trade with Austria-Hungary and to have protection from Serbia.
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Portugal declared its relationship with Great Britain by going to the Lisbon's Harbor and seizing German ships.
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Romania, who had remained neuttral in World War I, joined the Allies, inspired by Russia's success.
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Greece joined the Allies on July 2nd, 1917 Officially, after 3 years of neutrality.