Tau Ceti IV

Tau Ceti IV is a planet located in the Tau Ceti system.

In the 2150s, the city of Amber was the homeport of the ECS. 

In 2156, Tau Ceti IV was the sight of a battle between the Coalition of Planets and Romulan Star Empire that ended in the defeat of Starfleet and the occupation of Tau Ceti IV.