Jan Karol Chodkiewicz (c. 1560–1621) was one of the most prominent military commanders of the Polish–Lithuanian Commonwealth of his era. He became a field hetman of Lithuania in 1601 and advanced to the post of grand hetman in 1605. He played a major role in the Wallachian campaign of 1599–1600, the Polish–Swedish War of 1600–11, the Polish-Muscovite War of 1605–18, and the Polish–Ottoman War of 1620–21. His most famous victory was the Battle of Kircholm (now Salaspils, Latvia) in 1605, in which he dealt a major defeat to a Swedish army three times the size of his own. He died on the front lines during the siege of the Khotyn Fortress, a few days before the Ottomans lifted the siege and agreed to negotiate. (Full article...)