The Flagrant Swordmaiden fleet transitioned out of FTL in the star system suspected to be one jump away from the suspected coordinates of the Starlight Megalodon.
How did they know that?
Under the dim light of the brown dwarf in the center of this forgettable star system, the carcasses of both mechs and starships drifted in every direction. Several debris fields filled with hundreds of mechs and dozens of ships bore the marks of intensive battle.
The Vandals identified the distinctive profiles of several ships they previously observed. For example, a converted carrier from the NIN mixed up in one debris field, while in another debris field several starships from the Caged and the Red Tongs kept the other wrecks company.
All of these wrecks indicated that every participating force started to converge to a single point in space. It made a lot of sense for other outfits to choose this star system as a stopping point.