Voivode (//, also spelled voievod, voevod, voivoda, vojvoda or wojewoda) is a title denoting a military leader or warlord in Central, Southeastern and Eastern Europe since the Early Middle Ages. It primarily referred to the medieval rulers of the Romanian-inhabited states and of governors and military commanders of Hungarian, Balkan or some Slavic-speaking populations.
In the Polish-Lithuanian Commonwealth, voivode was interchangeably used with palatine. In the Tsardom of Russia, a voivode was a military governor. Among the Danube principalities, voivode was considered a princely title.