John III Sobieski (Polish: Jan III Sobieski, Lithuanian: Jonas Sobieskis; 17 August 1629 – 17 June 1696), from 1674 until his death King of Poland and Grand Duke of Lithuania, was one of the most notable monarchs of the Polish–Lithuanian Commonwealth. Sobieski's 22-year reign was marked by a period of the Commonwealth's stabilization, much needed after the turmoil of the Deluge and Khmelnytsky Uprising. Popular among his subjects, he was an able military commander, most famous for the victory over the Turks in the 1683 Battle of Vienna. Following his victories over the Ottoman Empire, the Ottomans named him the "Lion of Lechistan" and he was held as the saviour of European Christendom by the pope. Official title was (in Latin): Joannes III, Dei Gratia rex Poloniae, magnus dux Lithuaniae, Russiae, Prussiae, Masoviae, Samogitiae, Livoniae, Smolenscie, Kijoviae, Volhyniae, Podlachiae, Severiae, Czernichoviaeque, etc. Official title (Polish): Jan III, z łaski bożej, król Polski, wielki książę litewski, ruski, pruski, mazowiecki, żmudzki, kijowski, wołyński, podlaski i czernichowski, etc. English translation: John III, by the grace of God King of Poland, Grand Duke of Lithuania, Ruthenia, Prussia, Masovia, Samogitia, Livonia, Smolensk, Kiev, Volhynia, Podlasie, Severia and Chernihiv, etc. John Sobieski was born on 17 August 1629, in Olesko, a small town near Lwów in Galicia, now Ukraine, then part of the Ruthenian Voivodeship in the Crown of the Kingdom of Poland, Polish-Lithuanian Commonwealth to a notable noble family de Sobieszyn Sobieski of Janina coat of arms. His father, Jakub Sobieski, was the Voivode of Ruthenia and Castellan of Kraków; his mother, Zofia Teofillia Daniłowicz was a granddaughter of Hetman Stanisław Żółkiewski. John Sobieski spent his childhood in Żółkiew. After graduating from the Nowodworski College in Kraków in 1643, young John Sobieski then graduated from the philosophical faculty of the Jagiellonian University in 1646. After finishing his studies, together with his brother Marek Sobieski, John left for western Europe, where he spent more than two years travelling. They visited Leipzig, Antwerp, Paris, London, Leiden and the Hague. During that time, he met influential contemporary figures such as Louis II de Bourbon, Charles II of England and William II, Prince of Orange, and learned French, German and Italian, in addition to Latin. Both brothers returned to the Commonwealth in 1648. Upon receiving the news of the death of king Władysław IV Vasa and the hostilities of the Khmelnytsky Uprising, they volunteered for the army. They both fought in the siege of Zamość. They founded and commanded their own banners (chorągiew) of cavalry (one light, "cossack", and one heavy, of Polish hussars). Soon, the fortunes of war separated the brothers. In 1649, Jakub fought in the Battle of Zboriv. In 1652, Marek died in Tatar captivity after his capture at the Battle of Batoh. John was promoted to the rank of pułkownik and fought with distinction in the Battle of Berestechko. A promising commander, John was sent by King John II Casimir to Istanbul in the Ottoman Empire as one of the envoys in a diplomatic mission of Mikołaj Bieganowski. There, Sobieski learned the Tatar language and the Turkish language and studied Turkish military traditions and tactics. It is likely he participated as part of the briefly allied Polish-Tatar forces in the 1655 Battle of Okhmativ. After the start of the Swedish invasion of Poland known as "The Deluge", John Sobieski was among the Greater Polish regiments led by Krzysztof Opaliński, Palatine of Poznań which capitulated at Ujście, and swore allegiance to King Charles X Gustav of Sweden. However, around late March 1656, he abandoned their side, returning to the side of Polish king John II Casimir Vasa, enlisting under the command of hetmans Stefan Czarniecki and Jerzy Sebastian Lubomirski. During the three-day-long battle of Warsaw of 1656, Sobieski's command of a 2,000-man strong regiment of Tatar cavalry earned him promotion to the title of Lord Standard-Bearer of the Crown. A strong supporter of the French faction, Sobieski remained loyal to the King during the infamous Lubomirski Rebellion, which further helped his military career. In 1665, he married Marie Casimire Louise de la Grange d'Arquien and was promoted to the rank of Grand Marshal of the Crown and, the following year, to the rank of Field Hetman of the Crown. In 1667, he achieved another great victory over the Cossacks and their Crimean Tatar allies in the Battle of Podhajce during the Polish–Cossack–Tatar War (1666–71). On 5 February 1668, by now a famed and esteemed commander, he achieved the rank of Grand Hetman of the Crown, the highest military rank in the Polish–Lithuanian Commonwealth, and thereby the de facto commander-in-chief of the entire Polish Army.

• published: 19 Mar 2015
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