The SDS Galaxius is a Settlement Defense Front destroyer . It is under the command of Captain Lieutenant Radoslav Barkov. Galaxius attacked and destroyed the UNSA Ocana near Neptune.
Nick Reyes and Nora Salter boarded the destroyer during Operation Taken Dagger, stealing a prototype weapon and also killing the captain in the process.
- The ship may be named after the Galaxius Mons mountain range in the Martian Cebrenia quadrangle.