Moldavian–Ottoman Wars: Stephen the Great led Moldavian forces to defeat an Ottoman attack under Hadım Suleiman Pasha near Vaslui in present-day Romania.

The first conflict between Moldavia and the Ottoman Empire for which there is a historical account occurred during the reign of Alexandru cel Bun, in 1420, when the Ottomans tried to capture Chilia. The attack was unsuccessful.

Stephen III, better known as Stephen the Great, was Voivode of Moldavia from 1457 to 1504. He was the son of and co-ruler with Bogdan II, who was murdered in 1451 in a conspiracy organized by his brother and Stephen's uncle Peter III Aaron, who took the throne. Stephen fled to Hungary, and later to Wallachia; with the support of Vlad III Țepeș, Voivode of Wallachia, he returned to Moldavia, forcing Aaron to seek refuge in Poland in the summer of 1457. Teoctist I, Metropolitan of Moldavia, anointed Stephen prince. He attacked Poland and prevented Casimir IV Jagiellon, King of Poland, from supporting Peter Aaron, but eventually acknowledged Casimir's suzerainty in 1459.

The Battle of Vaslui was fought on 10 January 1475, between Stephen III of Moldavia and the Ottoman governor of Rumelia, Hadım Suleiman Pasha. The battle took place at Podul Înalt, near the town of Vaslui, in Moldavia. The Ottoman troops numbered up to 30,000 or 120,000, facing about 40,000 Moldavian troops, plus smaller numbers of allied and mercenary troops.

The Ottoman Empire, also called the Turkish Empire, was an imperial realm that controlled much of Southeast Europe, West Asia, and North Africa from the 14th to early 20th centuries; it also controlled parts of southeastern Central Europe, between the early 16th and early 18th centuries.