The Battle of Empress Teta was the name of an unsuccessful attempt by the Sith; Darth Cannae (against the orders of Darth Abeonis) to end the Sith Crusade quickly and efficiently by heading straight for Coruscant.
However, he had underestimated the defending Alliance forces and was swiftly defeated while in orbit of Empress Teta. Retreating, Darth Cannae was once again defeated at Bilbringi; effectively ending Cannae's military career.