WebAustria-Hungary, also called Austro-Hungarian Empire or Austro-Hungarian Monarchy, byname Dual Monarchy, German Österreich-Ungarn, Österreichisch-Ungarisches Reich, Österreichisch-Ungarische Monarchie, or Doppelmonarchie, the Habsburg empire from the constitutional Compromise (Ausgleich) of 1867 between Austria and Hungary until the …

WebRudolf, Crown Prince of Austria (Rudolf Franz Karl Josef; 21 August 1858 – 30 January 1889) was the only son and third child of Emperor Franz Joseph I of Austria and Duchess Elisabeth in Bavaria (Sissi).He was heir apparent to the imperial throne of the Austro-Hungarian Empire from birth. In 1889, he died in a suicide pact with his mistress Mary …

WebThe Russian Empire gradually entered World War I during the three days prior to 28th July 1914. This began with Austria-Hungary's declaration of war against Serbia, which was a Russian ally.The Russian Empire sent an ultimatum, via Saint Petersburg, to Vienna, warning Austria-Hungary not to attack Serbia.Following the invasion of Serbia, Russia …