The Segmentum Fortress of Segmentum Tempestus and thus headquarters of Battlefleet Tempestus. The Segmentum Fortress consists of a massive number of stations and shipyards orbiting the planet. Bakka is a hellish young world, inhospitable even compared to forge worlds but rich in minerals. The surface is mainly a bunch of basalt and granite rock "islands" in a sea of lava and other hot stuff with a smokey atmosphere choked by poisonous fumes. All in all, it's basically the planet Mustafar from Star Wars ripped wholesale, as expected of Geedubs.
Bakka was the site of the Gareox Incident in M36, which led to the Imperial Navy's current distaste for carriers. Battlefleet Tempestus became divided into a traditionalist faction and a pro-carriers faction (which happened to be full of chaos cultists). A space battle ensued which went poorly for the carriers until they went openly traitor and fled.
The Red Corsairs attacked the shipyards at the closing of the 41st Millennium in search of new rides to loot. They were repelled by a force of Grey Knights who tried and failed to take Huron Blackheart's head.
Yet AGAIN, they were raided by the Dark Eldar of the Kabal of the Black Heart, but the purpose of the raid was not to steal inferior mon'keigh ships, but to instead serve as a diversion for Vect to kidnap a bunch of Nulls from an inquisitorial facility hidden on the third moon of Bakka.
|The Planets, Systems, Regions and Sectors of the Galaxy|
|Imperial Homeworlds:||Holy Terra - Sacred Mars|
|Primarch Homeworlds:||Baal - Barbarus - Caliban - Chemos - Chogoris - Colchis |
Cthonia - Deliverance - Fenris - Inwit - Medusa - Nostramo
Nocturne - Nuceria - Olympia - Prospero - Macragge
|Notable Imperial Worlds:||Armageddon - Bakka - Cadia - Catachan - Cretacia - Ganymede |
Hydraphur - Necromunda - Krieg - Kronus - Phyrr - Pythos - Sacris
Sanctuary 101 - Scelus - Scintilla - Tanith - Tartarus - Titan - Vigilus
Vraks - Zayth - 108/Beta-Kalapus-9.2
|Daemon Worlds:||Bathamor - Black Marble - Fleshworld - Glass Moon |
Medrengard - Plague Planet - Sortiarius - Sicarus
|Systems and Regions:||Ghoul Stars - Halo Zone - Jericho Reach |
Kaurava System - Solar System - Stygius Sector
T'au Septs - Taelus System - Ultramar
|Types of Worlds:||Agri-World - Craftworld - Daemon World - Death World - Eldar World |
Forge World - Fortress World - Hive World - Civilised World - Tomb World