Mustafar Droid Factory

At a currently unknown time during the the Clone Wars, the Confederacy of Independent Systems constructed a facility on the lava planet of Mustafar which was a combination Droid Factory and Mining Facility. It was hidden and for an unknown reason unused until after the end of the Clone Wars, when Gizor Dellso, a Geonosian leader traveled to the planet to meet up with the rest of the Separatist leaders.

Finding the other Separatist leaders dead at the hands of Darth Vader, Dellso eventually found the Droid Factory, activated it, and began producing a private army of battle droids. He also began work with other Geonosians on schematics for a prototype infantry droid.

The facility was eventually destroyed in the Battle of Mustafar when the stormtroopers of the Galactic Empire 501st Legion were send to Mustafar to crush Dellso's droid uprising. They broke through the Separatist blockade, and, after placing an orbital strike beacon at a strategic point of the base, excecuted a Base Delta Zero order, pounding the factory into molten slag.

Years later, the ruined complex would be replaced by the Mensix Mining Facility in operation during the Galactic Civil War.