Ceres

The almighty shield of the EMC
For the longest time Ceres only claim to fame was being the largest body within the asteroid belt. Early EMC expansion arrived at the belt and repurposed Ceres into mobile mining platform which to mine asteroids. However less than a hundred years after the station was put into service it was attacked by an unknown entity, pres. Stript and derelict, it would orbit the belt untouched for 200 years, during a violent era of merc expansion within the belt. Some attribute the initial destruction of Ceres to Nabrok; a merc pirate who used Ceres infrastructure to construct a massive chassis, for the purpose of continued plundering.
After an apparent engagement, the EMC cruiser, Reclamation was destroyed. However the absense of stripping on its valuable tech suggests that it succeded in bringing down the suspected merc engagement force. After observing the apparent loss of Merc influence within the belt, Ceres was finally reclaimed by the EMC. Before the asteroid belt was mined clean, the EMC would refit Ceres as a mobile combat platform, the largest solaris would see until the construction of The Ring.
Ceres had been intended to take part in quashing the Synth Revolt; however the platform had not even arrived at mars by the time the Ring produced the great demonstration and ended the war. For a time Ceres was again left floating idle, considered obsolete owing to its inability to accelerate and maneuver in tactically viable timeframes. Everything changed for Ceres when the EMC recovered the technology for quantum fusion from JF. With the QFE, Ceres would cross from alliance space and into Jupiter's orbit path at the close of the Reclamation War.
The arrival of Ceres signaled the turn of the war in favour of the EMC, who had struggled against the JF Rooks and their tactical deployment of Jaculis skirmishers. The Jaculus boasted unseen maneuvering speeds, owing to modified form of martian meditation within soma. At the time, Ceres operated a massive plasma cannon, a munition now lawfully banned by alliance space. By the time JF was able to disable this cannon, the Jf Rooks were shattered, and the way to EMC victory was finally visible.
Since its glory days, Ceres has seen massive reengineering. The plasma cannon has been removed in place of a massive physical shield; as the JF war showed that Ceres' greatest strength was not its firepower, but its fortitude. Recently Ceres has been seen on the move again, this time bound of Mercury Faction.