Back when the orc army had attacked Strasbourg, Charlotte had muttered to himself, "Why didn't the orc Saint Ranks infiltrate the city first, then start the war?"
At the very least, that would have rendered the Divine Miracle Architecture of the Nine Great Righteous Gods unable to make use of its formidable defensive power.
So when he attacked Black Phoenix, he first used a scheme to draw away the last defensive force in the city. Then, rather than attacking directly, he had his soldiers disguise themselves and infiltrate Black Phoenix City. Only then did he lead all of his Saint Rank subordinates, disguised as ordinary people, into the city.
By the time Charlotte had left traces of the Serpent of Destiny on the Divine Miracle Architecture of the Nine Great Righteous Gods, his Saint Rank subordinates had already reached the vicinity of the Black Phoenix Palace.
Black Phoenix Emperor Yannis Hadrian had recently been unable to sleep at night or enjoy his food, worrying every day about how to fend off the Four-Nation Alliance Army.
He had gathered all the military forces in the entire country and sworn to fight the Four-Nation Alliance Army to the bitter end.
Word had recently spread that a Farsian named Charlot Mecklenburg intended to bypass the front lines and attack Black Phoenix City. He had obtained the other side's "military plan" ahead of time and immediately dispatched his last remaining army to ambush that audacious enemy force along the way.
Black Phoenix Emperor Yannis Hadrian had even issued an order to slaughter every last man of the army that dared offend the capital of the Black Phoenix Dynasty, leaving no prisoners. Even so, he remained furious and issued a special decree that Charlotte must be captured alive and brought back to Black Phoenix City,