Final answer:
Constantine's army defeated heavy armored and well-trained cavalry through a combination of tactics and military innovations, including the use of heavy cavalry and strategic maneuvers.
Step-by-step explanation:
Constantine's army defeated heavy armored and well-trained cavalry through a combination of tactics and military innovations. One key factor was the use of heavy cavalry by Constantine, which allowed his army to respond quickly to threats. Additionally, Constantine's army employed strategies such as flanking maneuvers and the use of well-trained infantry to weaken and overpower the enemy cavalry. Finally, Constantine's army was able to adapt its tactics based on the specific strengths and weaknesses of the enemy cavalry, which allowed them to exploit vulnerabilities and gain an advantage in battle.