The Battle of Tripolje (Serbian Cyrillic: битка код Трипоља/бој на Трипољу), also known as the Battle of Gračanica (Грачаничка битка), was fought in November 1402 between the Serbian Despotate, ruled by the Lazarević dynasty, and the Branković family, aided by the Ottoman Empire. The Lazarević brothers fell out following the battle. Lazarević allied himself with Hungary in 1403, ending his subservience to the Ottomans, while the Lazarević–Branković conflict continued over the years.