This mindset might seem incomprehensible to the people in the Border Prince's Territory. However, within the Empire, where there is a stronger emphasis on honor, status, and heritage, it is quite common.
So even if the enemy forces are the powerful Divine Chosen Knights or Champion Knights within the Border Prince's Territory, in his view, they are just a bunch of lucky useless fools that are no threat to him as the noble Knight Order Leader within the Empire.
As long as their Black Lynx Knight Order launches an attack, victory will be within their grasp!
They were further emboldened by their status as reinforcements, and since entering the Border Prince's Territory, they constantly displayed such arrogance.
