It was the complete eradication of Strasbourg's gang and human trafficking market!
All gang members, those who dared to resist were either killed on the spot if they were lucky, or captured alive if not, and then sent to Machu Picchu to become Labyrinth Guardians, while compliant gang members were reorganized into the Westwind Knights. Actually, in such chaotic scenes, many people not associated with the gangs also took advantage of the situation to loot on the streets, and those who encountered Charles received the same treatment as the gang members.
Because of Charles's move, the second coup in Strasbourg surprisingly experienced no chaos and even saw a rare surge in supplies in the market because Charles's caravan also took the opportunity to transport goods.
Earl Brittany's influence controlled Strasbourg, Charles's lost two Knight's Spears, and the magic oil painting quietly returned to their original places.