National Defense (, ON) was a volunteer military formation of the Second Polish Republic.
Its units (brigades and demi-brigades, divided into battalions) were subordinated to various Polish corps and armies.
National Defense is most commonly referred through its units (brigades - sing. Brygada Obrony Narodowej (Brygada ON) or battalions - sing. Batalion Obrony Narodowej (Batalion ON); the units were also named by the geographical region they were related to, and if more than one was formed, by Roman numerals, ex. Batalion ON "Lwów II")
National Defense units were composed of volunteers, some reservists and unemployed. They were equipped with second-grade weaponry, and their goal was to support defensive operations of the regular Polish Army. National Defense was created by an order of the Polish Ministry of Military Affairs on 5 December 1936; the brigades begun to be formed in 1937.
During the German invasion of Poland in 1939, National Defense mobilized 83 battalions (approximately 1,600 officers and 50,000 soldiers).
I DOK: Warszawska Brygada Obrony Narodowej (Warsaw Brigade of National Defense)
II DOK: Woà Âyà Âska Póà Âbrygada Obrony Narodowej (Volhynian Demi-Brigade of National Defense)
III DOK: Dzià Ânieà Âska Póà Âbrygada Obrony Narodowej (Dzisna Half-Brigade of National Defense)
IV DOK: Sieradzka Brygada Obrony Narodowej (Sieradz Brigade of National Defense)
V DOK: Dàbrowska Brygada Obrony Narodowej, Górnoà Âlàska Brygada Obrony Narodowej, Podhalaà Âska Brygada Obrony Narodowej, à Âlàsko-Cieszyà Âska Brygada Obrony Narodowej (Dàbrowa Górnicza Brigade of National Defense, Upper Silesian Brigade of National Defense, Podhale Brigade of National Defense, Cieszyn Silesia Brigade of National Defense)
VI DOK: Lwowska Brygada Obrony Narodowej, Tarnopolska Póà Âbrygada Obrony Narodowej (Lwów Brigade of National Defense, Tarnopol Half-Brigade of National Defense)
VII DOK: Poznaà Âska Brygada Obrony Narodowej, Kaliska Brygada Obrony Narodowej (Poznaà  Brigade of National Defense, Kalisz Brigade of National Defense)
VIII DOK: Cheà Âmià Âska Brygada Obrony Narodowej, Morska Brygada Obrony Narodowej, Pomorska Brygada Obrony Narodowej (Cheà Âmno Brigade of National Defense, Sea Brigade of National Defense, Pomorze Brigade of National Defense)
X DOK: Karpacka Brygada Obrony Narodowej, Podkarpacka Brygada Obrony Narodowej (Carpathian Brigade of National Defense, Subcarpathian Brigade of National Defense)
Brigades: Cheà Âmià Âska Brygada ON ⢠Cieszyà Âska Brygada ON ⢠Dàbrowska Brygada ON ⢠Kaliska Brygada ON ⢠Karpacka Brygada ON ⢠Lwowska Brygada ON ⢠Morska Brygada ON ⢠Podhalaà Âska Brygada ON ⢠Podkarpacka Brygada ON ⢠Pomorska Brygada ON ⢠Poznaà Âska Brygada ON ⢠Sieradzka Brygada ON ⢠à Âlàska Brygada ON ⢠Warszawska Brygada ON
Battalions: Bielsko ⢠Brodnica ⢠Brzozów ⢠Bydgoszcz ⢠Cheà Âm ⢠Chrzanów ⢠Cieszyn I ⢠Cieszyn II ⢠Czersk ⢠Dàbrowa Górnicza ⢠Gdynia I ⢠Gdynia II ⢠Gdynia III ⢠Grudziàdz ⢠Huculski I ⢠Huculski II ⢠Jabà Âonowo ⢠Jarosà Âaw ⢠Jasà Âo ⢠Kartuzy IV ⢠Kaszuby V ⢠Katowice ⢠Kcynia ⢠KÃÂpno ⢠Kà Âobuck ⢠Koronowo ⢠Koà Âcian ⢠Koà Âcierzyna ⢠Kowel ⢠Koà ºmin ⢠Krosno ⢠Krotoszyn ⢠Leszno ⢠Limanowa ⢠Lubliniec ⢠Lwów I ⢠Lwów II ⢠à Âuck ⢠Mazurski I ⢠Mazurski II ⢠Nakà Âo ⢠Nowy Sàcz ⢠Oborniki ⢠Olkusz ⢠Opalenica ⢠Ostrów ⢠Ostrzeszów ⢠Oà ÂwiÃÂcim ⢠Poznaà  I ⢠Poznaà  II ⢠Przemyà Âl ⢠Rawicz ⢠Rybnik ⢠Rzeszów ⢠Sambor ⢠Sanok ⢠Sosnowiec ⢠Stanisà Âawów ⢠Starogard ⢠Stry ⢠Szamotuà Ây ⢠à Âwiecie ⢠Tarnowskie Góry ⢠Tuchola ⢠Turka ⢠Warszawski I ⢠Warszawski II ⢠Warszawski III ⢠Wàgrowiec ⢠Wieluà  I ⢠Wieluà  II ⢠Zakopane ⢠Zawiercie â¢ à »nin â¢ à »ywiec