Ceris was a member of a Triannon religious faction that believed the Chosen Realm was created by the Makers in ten days. His faction waged war with D'Jamat's faction which believe it took only nine days.
After D'Jamat's forces commandeered Enterprise NX-01 in November of 2153, he engaged Ceris's ships. Ceris refused to surrender as D'Jamat demanded even though he offered Ceris to not to harm him or his crew. Ceris said that he knew that D'Jamat considered him and his people heretics, and that he knew that they would be killed. The fighting ceased when the Starfleet crew retook the ship. (ENT: "Chosen Realm")