Polish-Turkish relations have been historically close yet complex. Historically, the predecessor state of Poland being of the Polish–Lithuanian Commonwealth had a direct border with the Ottoman Empire, both states had a tumultuous history being in open and consistent warfare between one another for centuries particularly in the south eastern borderlands of the Polish–Lithuanian Commonwealth around Moldavia, modern day Ukraine, Romania and Crimea. Warfare between both states began in 1443 with the Crusade of Varna, the Polish–Ottoman War (1485–1503), the Moldavian Magnate Wars, the Polish-Ottoman War (1620-1621), the Polish–Ottoman War (1633–34), the Polish–Ottoman War (1672–1676) and the Polish–Ottoman War (1683–1699) which resulted in sections of Polish–Lithuanian Commonwealth falling under the direct administration of the Ottoman Empire under the Podolia Eyalet or Silistra Eyalet for some periods of time.