For the primary universe counterpart, see Fesarius.

In the mirror universe, the FF Fesarius was the flagship of the First Federation. The ship was in service in 2293. (ST video game: Shattered Universe)


On Stardate 9606.2, the Fesarius intcepted the ISS Excelsior at Theta Cassidium when it trespassed First Federation space on its way to the Janus Vortex. Balok ordered the destruction of the Excelsior and launched buoys and fighters to attack the Terran vessel. Excelsior's fighters destroyed the attacking vessels, and the ship resumed its heading. (ST video game: Shattered Universe mission: "Balok's War")

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