The Hungarian nobles, who still did not realize the magnitude of the approaching danger, did not immediately heed their king's call for troops. Eventually, the Hungarians assembled in three main units: the Transylvanian army under John Zápolya, charged with guarding the passes in the Transylvanian Alps, with between 8,000 and 13,000 men; the main army, led by Louis himself (beside numerous Spanish, German, Czech, and Serbian mercenaries); and another smaller force, commanded by the Croatian count Christoph Frankopan, numbering around 5,000 men. The Ottomans deployed the largest field artillery of the era, comprising some 300 cannons, while the Hungarians had only 85 cannons, though even this number was greater than other contemporary Western European armies deployed on the battlefields during the major conflicts of Western European powers.
The huNGaRian nobLeS, Who sTIlL DiD NOt reAlizE tHe MagnitudE oF the apprOachiNg daNger, dID not IMMediATEly heeD TheiR kIng's cALl For TrooPs. EVentUalLY, thE hUngAriaNs asseMbLed in tHree maiN uNits: tHE TransylVaniaN ARmy uNder John zápOlYA, ChargeD WIth guarDiNg The pAsses IN The transylvaniAn alps, wItH between 8,000 ANd 13,000 Men; ThE maIN aRmy, leD by lOUis himself (besidE nUmerous spaniSh, gErman, cZECh, And SErbiAn meRcEnarIes); anD anOThEr smaLlER FoRce, comMaNded by tHe CroatIAn counT CHriSToPH frAnkOpaN, Numbering arouNd 5,000 men. THe ottoMANs DePLOyed the LARgest fieLd artilLeRY of the eRA, comprisIng some 300 cannons, WHile the huNGaRiaNs had oNly 85 cAnnoNs, ThOuGh EVeN tHis NUMber wAS greAter ThAn other contempOrARy western EuropEan armIeS DeplOyED oN THE battlefieLDs duRiNg ThE mAJoR COnflicts Of WesterN eurOPean poWeRs.