John I Albert was elected due to his advocacy for an offensive policy against the Ottomans, and he made an alliance with Venice and Hungary for a joint effort against them.[2]Stephen the Great of Moldavia refused to join the alliance fearing that Moldavia would be the main scene of any Polish–Ottoman war.[2] Albert's efforts to displace him led to a quarrel with Ladislas of Hungary who considered Stephen as his vassal. This broke up their recent alliance and as a result, Albert planned on achieving his objectives without any foreign help.[2] After some years of preparation, Albert sent an envoy to Istanbul asking for peace but Bayazid II rejected this and both sides were ready for war by 1497.[3]
Battle
Albert was able to raise an army of 80,000 men and 200 cannons, in the summer of 1497 he set out planning to reconquer the fortresses on the northern Black Sea coast and take control of Crimea and the Danube Delta, while Stephen the Great of Moldavia was able to secure Ottoman support.[4][3][2] The Polish offensive began in the month of June in 1497, but the Moldavians, supported by the Ottomans, crossed into Bukovina and decisively defeated the Poles at Valea Cosminului (Battle of the Cosmin Forest) and then proceeded to raid into Polish territory as far as Lwów.[10][2][1] Albert's campaign was disastrous and his objectives had failed, so he made peace with the Moldavians and Ottomans in 1499 and recognised Ottoman control of the Black Sea.[2][11][12]
Consequences
As a result of this campaign, the Crimean Tatars were now left with a major empire including the entire steppe north of the Crimea from the Dniester to the Volga under the suzerainty of the Ottoman sultan.[2]
After the battle of the Cosmin Forest, John I Albert hastily returned to Poland (suffering another major defeat on the way where 5,000 Polish soldiers were killed in Bukovina) and built the Kraków Barbican, fearing an attack by the Ottoman Empire after his successive defeats. The walls of Kraków were strengthened and additional fortifications were built to defend the city in case of a Turkish invasion.[5][13]
^ abcd The Crusade against Ottomans and the Political Backdrop in East-Central Europe at the End of the Fifteenth Century
In: The Ottoman Threat and Crusading on the Eastern Border of Christendom during the 15th Century
Authors: Liviu Pilat and Ovidiu Cristea
Type: Chapter
Pages: 242–285
DOI: https://doi.org/10.1163/9789004353800_008
^ ab Page 42: Shirogorov V. V. Ukrainian War. The Armed Conflict for the Eastern Europe in XVI – XVII cеnturies. Volume I. The Melee of Rus’. (Up to the middle of XVI century)
Vladimir Shirogorov. – Moscow: Molodaya Gvardiya, 2017. – 919 [9] p.
^The Battle of Cosmin Forest, Tadeusz Grabarczyk, The Oxford Encyclopedia of Medieval Warfare and Military Technology, Vol. 1, ed. Clifford J. Rogers, (Oxford University Press, 2010), 434.