Legio IV Martia

Legio IV (or IIII) Martia was a legion of the Roman Empire, part of the Late Roman army. Its genesis is uncertain, but it probably existed in the time of Diocletian, and certainly in the time of Notitia Dignitatum.{{cite web |title= Notitia Dignitatum. In partibus Orientis |at= XXXVII |url= http://www.intratext.com/IXT/LAT0212/_P22.HTM | publisher= IntraText |accessdate= 2014-09-03}} That document places the legion at Betthorus, modern El-Lejjun in Jordan,{{cite web |url=http://pleiades.stoa.org/places/697643 |title=Places: 697643 (Betthorus) |author=Parker, S., DARMC, R. Talbert, S. Gillies, J. Åhlfeldt, T. Elliott |accessdate=September 2, 2014 |publisher=Pleiades}} under the command of the Dux Arabiae.{{cite web |url= https://www.livius.org/le-lh/legio/iiii_martia.html |title= Legio IIII Martia |last= Lendering |first= Jona |accessdate= 2014-09-03 |publisher= livius.org |archive-date= 2012-10-03 |archive-url= https://web.archive.org/web/20121003045609/http://www.livius.org/le-lh/legio/iiii_martia.html |url-status= dead }}{{Cite book| publisher = John Wiley & Sons| isbn = 9781405181440| last = Erdkamp| first = Paul| title = A Companion to the Roman Army| date = 2008| at = p. 253}} The place was in the civil jurisdiction of Palaestina Tertia.

The legion also had a fortress at Adhruh near Petra.G. Lankester Harding, 1959, The Antiquities of Jordan, p. 50. It was removed when the defence of the area was assigned to the vassal state of the Ghassanids around 530.