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Assasination of Franz Ferdinand
June 14th, 1914, the heir to the Austro Hungarian throne Franz Ferdinand and his wife Sophie are murdered by Gavrillo Princep, a member of the Black Hand Serbian terrorist group. This was the spark that started the war. -
USA Joins the War in Europe
After the Lusitania disaster and the Zimmerman Note, the USA declares war on Germany and the US(AEF) heads to France