He also learned the history of the castle garrison and the detachments of solar and lunar guards that patrolled the castle grounds. Dating back to Roam, every pegasus had to enlist for an unknown amount of years. This included stallions, despite the gender ratio of the time. Still, these postings were mainly utility-based or the ceremonial last line of defence inside the city. Exceptions existed, like the war hero Flash Magnus, but it was rare at the time.