The men of the unit... were armed in the traditional manner with lances, swords and small firearms, and mounted, of course, on horses.
The cavalrymen [attacked] ranks of surprised German infantrymen and wreaking havoc with their sabers and lances, effectively breaking up and scattering the infantrymen, most of whom fled into the woods. The Poles, however, had little time to rejoice in their victory, for German armored cars suddenly appeared and began pouring machine gun fire into the ranks of the Polish cavalry.
The difference being that the Poles didn’t attack the armor with cavalry, the armor showed up after a successful cavalry attack against infantry.