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Franz Ferdinand was the heir to the Austro-Hungarian throne.
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On July 28, 1914, 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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On the afternoon of this day in 1914, two days after declaring war on Russia, Germany declares war on France, moving ahead with a long-held strategy, conceived by the former chief of staff of the German army, Alfred von Schlieffen, for a two-front war against France and Russia. Hours later, France makes its own declaration of war against Germany, readying its troops to move into the provinces of Alsace and Lorraine, which it had forfeited to Germany in the settlement that ended the Franco-Prussi
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Germany invades Belgium to outflank the French army
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Britain protests the violation of Belgian neutrality but decides to fight
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Because Russia was alies with Germany
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Great Britton declares war on Austria - Hungary. Austria invades Poland. Austria - Hungary invades Serbia.
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sunk by a german U boat "submarine"
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diplomatic proposal from the German Empire to Mexico to make war against the United States
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resident Wilson appeared before a joint session of Congress and asked for a declaration of war against Germany