That is to say, he had deduced it through his own knowledge.
"Don't lump me together with those old men set in their ways. Ever since the Seven Day War, I have been continually refining myself. All so that one day, I could battle you greedy Charlemagne folks."
The voice remained calm, but the intense heat fermented in the air.
One couldn't imagine his experiences, nor could they know his sufferings, yet the hatred and perseverance attached to his words were distinctly palpable.
It seems that what had always spurred this man onward and even kept him alive wasn't just a simple sense of patriotism and national sentiment; there was likely a purer form of hatred as well. Fueled by an undiminished hatred, he continued to refine himself, to strive ceaselessly, even willing to abandon the inherent notions and glory of a magician, laboring to the point he had reached today.
"Revenge, huh..."