Excerpts from Books and Wikipedia
"The Battle of Hermannstadt, also known as the Battle of Sibiu or the Battle of Szeben, was fought between the army of the Hungarian Kingdom and the Ottoman Empire on March 18 and March 22, 1442, near Marosszentimre and Hermannstadt (Szeben), (today Sântimbru and Sibiu, Romania). The Hungarian forces were commanded by John Hunyadi. Hermannstadt was Hunyadi's third victory over the Ottomans after the relief of Smederevo in 1437 and the defeat of Ishak Beg midway between Semendria and Belgrade in 1441." [[Wikipedia] Smederevo fell to the Turks in 1459. "Marks the end of the Medieval Serbian state." [Wikipedia: Timeline of Middle Ages]