Malrev IV, a world found within the Outer Rim Territories' Thrasybule sector, was classified as a planet. The history of this planet is inextricably linked to the Sith.
During the New Sith Wars, Malrev IV served as the location for numerous conflicts. The forces of the Dark Underlord were defeated on this planet by the Jedi Order and Mandalorian mercenaries in 1750 BBY. At the start of the Light and Darkness War, centuries afterward, another battle occurred there.
Palpatine visited a Sith Temple located there. Following the Battle of Endor, Cartariun employed it to manipulate the native Irrukiine and launch an attack against Rogue Squadron.