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Arthur Roland Keller was born http://memory.loc.gov/diglib/vhp/story/loc.natlib.afc2001001.55537/
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Known as the event that sparked the war. Archduke Franz Ferdinand, along with his wife, was assassinated in Sarajevo, Bosnia, during an inspection trip for the imperial armed forces in Bosnia and Herzegovina. Their killer, Gavrilo Princip, was a Serbian nationalist seeking an end to the Austro-Hungarian rule in Bosnia and Herzegovina. Austria-Hungary, as well as other countries, blamed the Serbian government for the incident. Austria-Hungary would soon be presented with an offer of assistance.
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Days after the assassination of the the Archduke of Austria-Hungary, ruler of the German Empire, Kaiser Wilhelm II promised Austri-Hungary their assistance if a battle arose against Serbia.
(http://www.history.com/this-day-in-history/archduke-franz-ferdinand-assassinated)(I ran out of space on the last event for the link) -
On July 28th, 1914, Austria declared war on Serbia. Soon after (August 1st) Germany declared war on Russia. On August 3rd, Germany declared war on France and invaded Belgium. Germany then had to put the Schlieffen Plan into place.
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In 1915, a German submarine torpedoed this British ship killing 128 Americans. This turned many Americans against Germany.
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Keller enlisted in the military on a trip from Chicago to Fairfield, Iowa
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Keller was honorably discharged