Grievous's fortress was the personal hideout of the cyborg General Grievous, located on the third moon of Vassek. The castle was specifically designed to fit the needs of the General, with a multitude of spare parts on hand as well as full medical facilities. In Grievous's absence, it was inhabited only by medical droid EV-A4-D, Grievous's pet roggwart Gor and a number of MagnaGuards who protected the lair. It also had a collection of traps for "uninvited guests". Grievous also kept lightsabers of Jedi such as Neebo at his fortress.