The Battle of Segesvár, also called the Battle of Fehéregyháza, was a battle in the Hungarian Revolution of 1848, fought on 31 July 1849 between the Hungarian revolutionary army under the command of Lieutenant General Józef Bem and the Russian V Corps under General Alexander von Lüders. The battle ended with the victory of the Russian army, which was presumably the death location of the Hungarian poet and national hero Sándor Petőfi, but his body was never found. Furthermore, The Chief of Staff Russian V corps, General Grigory Skariatin was killed at the battle. Although heavy, the defeat was not decisive for the Hungarian army of Transylvania, Lieutenant General Józef Bem continuing his resistance in the province until the Battle of Nagycsűr on 6 August 1849.

Józef Zachariasz Bem was a Polish engineer and general, an Ottoman pasha and a national hero of Poland and Hungary, and a figure intertwined with other European patriotic movements. Like Tadeusz Kościuszko and Jan Henryk Dąbrowski, Bem fought outside Poland's borders anywhere his leadership and military skills were needed.