Deaths on March 11

Stanisław Koniecpolski, Polish soldier and statesman (b. c. 1592)

Stanisław Koniecpolski (1591 – 11 March 1646) was a Polish military commander, regarded as one of the most talented and capable in the history of the Polish–Lithuanian Commonwealth. He was also a magnate, a royal official (starosta), a castellan, a member of the Polish nobility (szlachta), and the voivode (governor) of Sandomierz from 1625 until his death. He led many successful military campaigns against rebelling Cossacks and invading Tatars. From 1618 he held the rank of Field Crown Hetman before becoming the Grand Crown Hetman, the military commander second only to the King, in 1632.

Koniecpolski's life was one of almost constant warfare. Before he had reached the age of 20, he had fought in the Dymitriads and the Moldavian Magnate Wars. Later, in 1620, he took part in the Battle of Cecora, during which he was captured by Ottoman forces. After his release in 1623, he defeated the Ottomans' Tatar vassals several times between 1624 and 1626. With inferior numbers, during the Polish–Swedish War (1626–29), Koniecpolski stopped the Swedish forces of Gustavus Adolphus from conquering Prussia and Pomerania before the war was concluded with the Truce of Altmark. In 1634, he defeated a major Turkish invasion at Kamianets-Podilskyi (Kamieniec Podolski), in modern Ukraine, while in 1644, his victory against the Tatars at the Battle of Ochmatów brought him international fame and recognition.