"T-This, how can this be…" the Marquis's voice trailed off in incredulity, his jaws on the verge of sagging. As several simulations spiraled through his head, one conjecture prompted him to curse his spymaster, quick-wittedly shedding light upon the mysterious arrival of the army far behind his rearguard. "I condemn you to the Abyss, Ezekiel! Damn you, you inept fool!"
And thus, the Battle of Regalia started off with two cavalry units facing off one another. However, if they were evenly matched, why do you think Lord Ash signaled a retreat?