Vaetov

"Vaetov... ISB are no fools, always have a back up, but to let the rebellion gain access to the facility, to steal the Death Star plans again? I'm not allowing them go without a fight."

- Arden Zevrin

Vaetov was a Imperial Stronghold that kept secretive information much like Scariff. However Vaetov orbits through the jets of its parent star which led the Empire to make a special planetary shield that blocks out the intense radiation and heat from the star.

Vaetov holds information that the Empire could decimate the Rebellion. Such projects named "Sovereign" and the Death Star 2 plans.

History
Vaetov was an ISB stronghold and only known to some in ISB. The Emperor ordered Zevrin to allow to "release" a prisoner back to rebellion in hopes they would siege the facility, get the plans and leave so the rebellion would be finally destroyed.

The prisoner escaped, told the rebellion of the existence of Vaetov and in turn Mon Mothma tasked a group of Bothans and Renegade Squadron to get the vital information and destroy the facility "if" possible. Vaetov wasn't destroyed and many Bothans died at the hands of Scourge Squadron.