Jan Zamoyski's expedition to Moldavia was a successful military campaign in 1595 that aimed to establish Moldavia as a Polish vassal state.
In early 1595 Sigismund Báthory, Prince of Transylvania, convinced ÃÂtefan RÃÂzvan, a commander of Hungarian mercenaries in the service of the Hospodar Aaron the Tyrant to rebel. ÃÂtefan captured Aaron and sent him to Transylvania, then proclaimed himself as the new Hospodar and a vassal of Sigismund. In response the Ottoman Sultan Mehmed III, who had been Aaron's protector and sovereign, decided to put an end to the ongoing power struggles in Moldavia, Wallachia, and Transylvania between various magnates. While Wallachia was to receive a new Turkish sponsored ruler, Moldavia was to be simply incorporated into the Ottoman Empire as a province. The Ottoman intervention aroused alarms in the PolishâÂÂLithuanian Commonwealth which sought to reestablish its influence in the region, having lost sovereignty over Moldavia some hundred years earlier after the Battle of the Cosmin Forest.
In the summer of 1595, a Polish army of 5,000 cavalry and 2,300 infantry entered Moldavia, occupied Khotyn on August 27 and the capital IaÃÂi on September 3, where Zamoyski installed Ieremia MovilÃÂ as the new hospodar who pursued a policy favorable to Poland.The Ottoman Sultan, not idle, sent against Zamoyski an army consisting mainly of Tartars and regular Ottoman troops in a strength of about 25,000. Zamoyski, upon hearing of the approaching enemy, fortified himself between the river Prut. The Tatar-Ottoman army arrived on September 18, and several skirmishes took place on the same day. The main clash occurred on September 19 when the Tatars unsuccessfully tried several times to break into the Polish camp, on September 20 the Tatar Khan Gazi, unable to gain victory over the Polish camp, entered negotiations. On September 21, a peace treaty was signed in which the Tatars recognized Ieremia MovilÃÂ as hospodar and agreed to station Polish troops in Moldavia. On September 23, the Tatars proceeded to retreat.
After the victory of the Polish army at Cecora and the recognition of Ieremia MovilÃÂ as hospodar, Moldavia became a de facto Polish-Ottoman condominium, paying tribute to the Ottomans while at the same time being a vassal state of the Polish-Lithuanian Commonwealth. However, this did not please the previous hospodar ÃÂtefan RÃÂzvan, who, aided by the Turks at the head of an army of 5,000, entered Moldavia to overthrow Ieremia MovilÃÂ.
On December 12, RÃÂzvan's army skirmished with a twice smaller Polish force near Suceava. Commander Jan Potocki tried unsuccessfully to resolve the conflict with RÃÂzvan. However, RÃÂzvan was not eager to negotiate, so Potocki gave him the battle. RÃÂzvan's forces spread out on a mountain sheltered by palisades, while the Poles took up a position in the valley opposite. The Poles opened the battle with artillery fire, killing one of the commanders of RÃÂzvan's forces in the process. The shelling was followed by a counterattack by the Transylvanian cavalry, which was smashed by Potocki, the Poles broke into RÃÂzvan's camp, who defended himself bravely although he had to give way and retreat with the remnants of his troops. RÃÂzvan, however, did not escape far and was quickly caught, Jeremi Moghila showed him no mercy and after long torture ordered him to be impaled.
In 1597, the treaty of Polish-Ottoman friendship was renewed recognizing the election of hospodars by Polish kings, but Moldavians still had to pay tribute to the Sultan. The following year, the Porta obliged the Crimean Khan not to violate Polish borders and even to provide military assistance at the king's call.
Moldavia would cease to be a Polish vassal after the 1620âÂÂ1621 PolishâÂÂOttoman War.