Charles was idle in Strasbourg and couldn't sit still anymore, so he gathered some gang members from the Lucavaro District...
Well, his Westwind Knights were everywhere, in Behemoth, South Serif, Cappadocia, Saint Michael Island, and Machu Picchu, but almost nowhere in Strasbourg, so he had to borrow some gang members.
In order to enlist these people, he also took the opportunity to clean up the gangs in the Lucavaro District, ensuring that the Westwind Knights were the only force left in his territory, with no other underground power.