The Black Army (, pronounced ), "Black Legion" or "Regiment"—possibly named after their black armor panoply, see below) is, in historiography, the common name given to the military forces serving under the reign of King Matthias Corvinus of Hungary. The ancestor and core of this early standing mercenary army appeared in the era of his father (John Hunyadi) in the early 1440s. The idea of the professional standing mercenary army came from Matthias' juvenile readings about the life of Julius Caesar.