The word really comes from the word 'húsz' (twenty), '-ár' (price), but it is true that King Matthias had already created such light cavalry in the case of Fekete-Sereg. The reason was the Serbs. Because of the advance of the Turks, several Serbian light cavalry troops broke the Hungary's south and raided. The Hungarian heavy cavalry could do nothing against them. Therefore, light cavalry had to be used in the Black Army. However, it should be known that the Fekete-Sereg was a mercenary army, in which the Hungarians were fewer in number. The majority of the cavalry were Serbs and Croats. And the majority of the infantry was Czech!

Hi, book name and his autor's name inside the video?

According to Webster's the word hussar stems from the Hungarian huszár, which in turn originates from the Serbian хусар (Husar, or гусар, Gusar) meaning pirate, from the Medieval Latin cursarius (cf. the English word corsair).[19] A variant of this theory is offered by Byzantinist scholars, who argue the term originated in Roman military practice, and the cursarii (singular cursarius).[20] Through Byzantine Army operations in the Balkans in the 10th and 11th centuries when Chosarioi/Chonsarioi were recruited with especially Serbs,[21] the word was subsequently reintroduced to Western European military practice after its original usage had been lost with the collapse of Rome in the west.[22] The hussars reportedly originated in bands of mostly Serbian warriors [23] crossing into Kingdom of Hungary after the Ottoman invasion of medieval Serbian state at the end of the 14th century. The Governor of Hungary, Hunyadi János - John Hunyadi, created mounted units inspired by his enemy the Ottoman Turks. His son, Hunyadi Mátyás Matthias Corvinus, later king of Hungary, is unanimously accepted as the creator of these troops. Initially they fought in small bands, but were reorganised into larger, trained, formations during the reign of King Matthias Corvinus.[24][25] Initially the first units of Polish hussars in the Kingdom of Poland were formed in 1500, which consisted of Serbian mercenaries.[26]

Húsz Ár. Price of 20.