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Crisis in the Balkans
Gavrilo Princip assassinates Austrian Archduke Franz Ferdinand -
War Declared
Unhappy at Serbia's response, Austria-Hungary declares war on Serbia -
Allies Join
Due to her alliances, Russia mobilizes armed forces to support Serbia -
Germany joins
Due to alliances, Germany declares war on Russia -
More from Germany
Germany declares war on France -
Schlieffen Plan
Germany invades Belgium. Britain declares war on Germany -
Austria-Hungary strikes
Austria-Hungary declares war Russia -
Allies declare war
France and Great Britain declare war on Austria-Hungary