Se this legally free ebook:

  • János Hunyadi: Preventing the Ottomans from Conquering Western Europe in the Fifteenth Century [Masteral Thesis on Military History], by Major Barnabas Bartok, Hungarian Army (Fort Leavenworth, Kansas: U.S. Army Command and General Staff College, 2011). Available in PDF format at the Defense Technical Information Center.

In remembrance of the Second Battle of Kosovo (17–20 October 1448), in which outnumbered Christian forces led by John Hunyadi were betrayed into defeat by Ottoman forces led by the Sultan Murad II.