Crusaders are a army of marines set up by Fleet admiral SakaZuki (Akainu) to spread the word of Absolute justice through biblic instruction and eliminating any that oppose World Government laws through suffrage. They are the World Government poster childs to the fight against pirates. There set up is in the grand line to make up for the transfer of Marineford to the new world. The number and size is a small fraction in the comparison to the marines. Due to this they emphasize in qaulity over qauntiny. Even raising their knights from youth to adult on their head qaurters. The organization has been a 200 years in the making before revealing itself. The best time was during the chaos of the time skip where they took control of maintaining peace and hunting down pirate crews from fresh bran