Stanisław Koniecpolski or Stanislas Koniecpolski (ca.

1590/1594 – 11 March 1646) is a Polish nobleman (szlachcic), magnate, official (starost and castellan), voivode of Sandomierz from 1625, and Field and later Grand Crown hetman (second highest military commander, after the king) of the Polish-Lithuanian Commonwealth.

Stanisław Koniecpolski lives a life that involves almost constant warfare, and during his military career he wins many victories.

Before he reaches the age of 20, he has fought in the Dymitriads and the Moldavian Magnate Wars, where he is taken captive by the forces of the Ottoman Empire at the Battle of Cecora in 1620.

After his release in 1623 he defeats Ottoman vassals the Tatars several times in the years 1624 - 1626.

With inferior forces he fights the Swedish forces of Gustavus Adolphus to a stalemate in Prussia.

Koniecpolski tries several more times, July 15 and Aug 9, but is repelled by the Swedes, during the second phase of the Polish-Swedish War (1626–1629), which ends with the Truce of Altmark.

Koniecpolski defeats a major Turkish invasion at Kamieniec Podolski (Kamianets-Podilskyi) in Ukraine in 1634, and during his life ledads many other successful campaigns against the rebellious Cossacks and invading Tatars.

He is considered to be one of the most skilled and famous military commanders in the history of Poland and Lithuania.