After the end of the One Year War, the Earth Federation Forces, facing severe financial difficulties and struggling to rebuild their military, attempted to strengthen their forces by reusing mobile suits seized from the former Principality of Zeon. Among these, some mobile suits underwent significant modifications and were adopted as Federation units, leading to mass production. One such example is the RMS-117 Galbaldy β.

In July of Universal Century 0087, with the full authority of the Earth Federation Forces being delegated to the Titans, Luna Two Base also transitioned into a complete Titans base. Consequently, the Galbaldy β units deployed at Luna Two underwent backpack reinforcement modifications and a color scheme change, becoming part of the Titans' fleet.

Old 1/144 Galbaldy β (Titans Official Deployment Specification) | モトッチ's Gunpla works