Voivode, Vojvoda or Wojewoda, etc. is a Slavic term denoting a "war-leader" or "warlord" in Central, Eastern and Southern Europe since the Early Middle Ages. During the Byzantine Empire it referred to military commanders mainly of Slavic populations.
Etymology
Voivode, Vojvoda or Wojewoda is a term with two roots, firstly, voi related to warring and secondly, vod meaning leading in Old Slavic, together denoting a "war-leader" or "warlord". The Latin translation is comes palatinus for the principal commander of a military force, deputising for the monarch. In early Slavic vojevoda meant the bellidux the military leader in battle. The term has also spread to non-Slavic languages in the area like Hungarian and Romanian.
The transition of the voivode from military leader to a high ranking civic role in territorial administration occurred in most Slavic countries and in the Balkans in the Late Middle Ages. They included Bulgaria, the Czech lands, Moldavia, Poland and Ukraine. Moreover in the Czech lands, but also in the Balkans, it was an aristocratic title corresponding to dux, Duke or Knyaz. Many noble families of the Illyricum still use this title despite the disputes about the very existence of nobility in the Balkans.
Commonwealth of Poland-Lithuania
In the 16th-century Commonwealth of Two Nations the Wojewoda was a civic role of senatorial rank and neither heritable nor a title of nobility. His powers and duties depended on his location. The least onerous role was in Ruthenia while the most powerful wojewoda was in Royal Prussia. The role began in the crown lands as that of an administrative overseer, but his powers were largely ceremonial. Over time he became a representative in the local and national assemblies, the Sejm. His military functions were entirely reduced to supervising a Mass mobilization and in practice he ended up as little more than overseer of weights and measures. Appointments to the role were usually made until 1775 by the King. The exceptions were the voivodes of Polock and Vitebsk who were elected by a local poll of male electors for confirmation by the monarch. In 1791 it was decided to adopt the procedure throughout the country but the Partitions of Poland put a stop to it.. Polish voivodes were subject to the Law of Incompatibility which prevented them from simultaneously holding ministerial or other civic offices in their area. The role was revived during the Second Polish Republic after Poland regained her independence in 1918.
Modern Poland
Voivodes continue to have a role in local government in Poland today, as overseers of self-governing local councils, answerable not to the local electorate but as representatives/emissaries of the central government's Council of Ministers. They are appointed by the Chairman of the Council of Ministers and among their main tasks are budgetary control and supervision of the administrative code.