Mustafar's Orbit- Preventative Measures

Although the Clone Wars were over, some people never seemed to get the message. The worst case of denial was Gizor Deiso, a Geonosian Separatist who'd somehow escaped Lord Vader's efforts to wipe out the remnants of the CIS. Lord Vader tracked him to Mutsafar and brought us to finish the job. It seem like a simple enough mission, but we saw the first fleet of droid ships hovering over the planet, we suddenly realized that Deiso's denial mechanisms were a little more dangerous than we'd imagined. For starts, they somehow got a transport in our hanger. I never seen I droid to that as quickly as they did. They sabotage most of the ships and even after we took out the transport, some were still within the ship. Alpha and Headshot were taking those out while Cutter and I got out over the melting rock planet. This battle reminded me too must of the Clones Wars, something that should be over. They were also better than before, could strike us down quickly, could evade our attacks better, they have been modify better than the Separatist could of ever made. How sad is it that one bug out made the design of an army? There down fall was the lack of numbers they usually have, they were not masse produce. After that the fighter were mostly destroy, the main ship was no challenge. We took more casualties then we would of like but we got total victory. We even got an enemy ship to gather data of the modifications. The slight whiff of nostalgia the 501st had enjoyed fighting droids fleet over Mustafar had already grown sour by the time we'd establish orbital position. Now it was time to find out what this was all about.

I never heard of a CIS rebellions. How must did the Empire keep form us?