Ernst Gideon von Laudon, since 1759 Freiherr von Laudon (originally Laudohn or Loudon; 13 February 171714 July 1790), was a Baltic German-born Austrian generalisimo and one of the most successful opponents of the Prussian king Frederick the Great. He served the position of military governorship of Habsburg Serbia from his capture of Belgrade in 1789 until his death while cooperating with the resistance fighters of Koča Anđelković. Background and early career The Laudohn family, of mixed German and Latgalian origin, had been settled in the estate of Tootzen, near Laudohn in Eastern Livonia (present-day Latvia) before 1432. Laudon himself claimed a kinship with the Scottish Earls of Loudoun, which could not be established. His father Otto Gerhard von Laudohn was a lieutenant-colonel, retired on a meagre pension from the Swedish service. As upon the Great Northern War Livonia had been ceded to Russia according to the 1721 Treaty of Nystad, the boy was sent to the Imperial Russian Army as a cadet in 1732. During the War of the Polish Succession he took part in the 1734 Siege of Danzig led by Feldmarschall Burkhard Christoph von Münnich, he marched against French troops up to the Rhine in 1735 and back to the Dnieper River into the Turkish campaign. After the 1739 Treaty of Belgrade, he returned to the Russian court at Saint Petersburg. Dissatisfied with his prospects and the conditions in the Russian Army, he finally resigned in 1741 and sought military employment elsewhere. He applied first to King Frederick the Great, who however declined his services. At Vienna he had better fortune, being made a captain in the Freikorps of Franz von der Trenck. During the War of the Austrian Succession, he took part in its forays and marches, though not in its atrocities, until wounded and taken prisoner in Alsace. He was shortly released by the advance of the main Austrian army. Silesian Wars His next active service, still under Trenck, was in the Silesian mountains in 1745 (during the Second Silesian War against Prussia), in which campaign he greatly distinguished himself as a leader of light troops. He was present also at the Battle of Soor. He retired shortly afterwards, owing to his distaste for the lawless habits of his comrades in the irregulars, and after long waiting in poverty for a regular commission he was at last made a captain in one of the frontier regiments,