According to wikipedia:
Infantry was less important but formed a stable basis in the integrity of an army. They were organized from mixed ethnicities and were composed of heavy infantry, shielded soldiers, light infantry and fusiliers. Their characteristics include the combination of plate and mail armour and the use of the pavises (these painted willow-wood large shields were often ornamented and covered with leather and linen). The latter served multiple purposes: to hold off enemy attacks, to cover ranged infantry shooting from behind (fusiliers engage first, the archers fire constantly), and moveable hussite-style tabor (with a restricted deployment of war wagons in number). The infantry contained Swiss pikemen, who were held in high honour by the king.
In 1481, the Black Army's infantry was described as:
"The third form of the army is the infantry, which divides into various orders: the common infantry, the armoured infantry, and the shield bearers.... The armored infantry and shield bearers cannot carry their armor and shields without pages and servants, and since it is necessary to provide them with pages, each of them requires one page per armor and shield and double bounty. Then there are the handguners... These are very practical, set behind the shield-bearers at the start of the battle, before the armies engage, and in defense. Nearly all of the infantry and arbusiers are surrounded by armored soldiers and shield-bearers, as if they were standing behind a bastion. The large shields set together in a circle present the appearance of a fort and similar to a wall in whose defense the infantry and all those among them fight almost as if from behind bastion walls or ramparts and at the given moment break out from it."
— Matthias Corvinus's letter to Gabriele Rangoni,
Bishop of Eger So I think that it should be made a spear unit with a pavise shield and black armour, because those were the marks of the Black Army
Therefore the Pavisier Spear unit of the Black Army should look like this
(they're the Hungarian Late Pavisiers from the Medieval Kingdoms 1212AD mod for Attila Total War)
Also the crossbow unit should have a more western influnced armour but obselete. Something like this I believe
and it should be called just Hungarian Crossbowmen, because as far as I know there was no such company of soldiers as Transylvanian Crossbowmen. But there was a large tribe of people who lived in medieval Transylvania who called themselves Szekely. The Szekely provided the Hungarian King with plenty of soldiers who fought from horseback with crossbow and swords (something like the mounted crossbowmen of Novgorod in Teutonic campaign).
Moreover I think that it could be a great addition to the Hungarian roster if we could add the War Wagons, which were utilised in great numbers by the Hungarians, especially by Janos Hunyadi and his son Matthias Corvinus in their wars against the Ottomans.
Lastly but not least I would like very much the usage of these flags in the hungarian army as banners 'cause they're freaking amazing!
Moreover I found this extremely awesome site about the Hungarian Army of the late 15th centrury http://myweb.tiscali.co.uk/matthaywo...on.htm#Szekely