The society, called a "pious institution" by William of Puylaurens, was militant towards usurers (Jews) and Cathars, robbing them and destroying their homes.
A Black Brotherhood, so-called in opposition to the White, was soon formed and the two factions went to war in the streets of Toulouse.
According to Puylaurens: Daily the two parties would clash, banners flying, bristling with weapons, even with cavalry in evidence.
Through the agency of His servant the bishop, Our Lord came to bring them, not a bad peace but a good war.
[1] From the White Brotherhood Folquet selected 500 men-at-arms and sent them to aid the Albigensian Crusade in besieging Lavaur.