Segmentum Tempestus is one of the five great Segmentums, the Imperium’s biggest territorial divisions. It’s the southern slice of the galaxy, run from the fortress world of Bakka, and it’s defined less by Chaos and more by xenos raiders, ork Waaaghs, and the slow grind of holding a frontier together.
Where it is and who runs it
Tempestus covers the galactic south, a vast region that the Imperium carves into Sectors, each roughly a 200 light-year cube. The Segmentum Fortress sits at Bakka, which is the naval and administrative hub for the whole region.
That fortress matters. It’s where fleet assets are coordinated, where campaigns get planned, and where the Adeptus Terra’s writ actually reaches. Lose Bakka and you don’t just lose a world, you lose the spine of the Segmentum.
A different kind of war
Tempestus sits far from the two big Chaos wounds in the galaxy, the Eye of Terror and the Maelstrom. So it dodges a lot of the warp-driven invasions that define other Segmentums.
Instead, it bleeds to xenos. Ork Waaaghs, raiders, and alien empires are the everyday threat here, and the Imperium’s answer is usually a grinding defensive war rather than a crusade. It’s a frontier in the truest sense, less about one apocalyptic foe and more about a hundred smaller ones.
Worlds that matter
The roll call of Tempestus worlds reads like a greatest hits of Imperial lore. Krieg, the death world that breeds the Death Korps. Tallarn, the desert world of the famous tank regiments. Deliverance, home of the Raven Guard. Inwit, the ice world tied to the Imperial Fists’ gene-line. Ophelia VII, one of the great Ecclesiarchy centres.
There’s more. Barbarus, Cretacia, Graia, Gryphonne IV, Praetoria, Posul, Pranagar, Morda Prime, Antagonis, Amarah Prime, Hieronymous Theta, and Zhao-Arkkad all sit within its borders. The Craftworld Iyanden is also found here, along with the Mandragoran Stars, the Serpent Spine, and the Veiled Region.
| World or object | Why it matters |
|---|---|
| Bakka | Segmentum Fortress and naval hub |
| Krieg | Home of the Death Korps |
| Tallarn | Famous desert tank regiments |
| Deliverance | Raven Guard homeworld |
| Ophelia VII | Major Ecclesiarchy centre |
| Iyanden | Craftworld of the Eldar |
Sectors worth knowing
Tempestus is broken into named Sectors, and a few of them carry real weight in the lore. The Orpheus Sector is the big one, thanks to the Fall of Orpheus campaign. The Caligari Sector turns up in games, and the Forsarr Sector is a known ork trouble spot.
Others include Caradryad, Chiros, Corribra, Khaldun, Nemesys, Reductus, Scaephan, and Uhulis. They don’t all get equal screen time, but together they show how the Segmentum is stitched from hundreds of small, semi-independent warzones.
How it fits with the other Segmentums
Tempestus is one of five. Segmentum Solar is the centre, the throneworld’s own backyard. Ultima Segmentum is the enormous eastern half. Obscurus covers the far north and the Eye of Terror’s neighbourhood. Pacificus takes the north-west.
That leaves Tempestus holding the south, and its identity comes from that position. It’s the Imperium’s quiet-but-bleeding edge, rarely the setting of a galaxy-ending event, constantly the setting of a hundred nasty little ones.
Key facts
- Segmentum Tempestus is one of the Imperium’s five Segmentums, covering the galactic south.
- Its Segmentum Fortress is at Bakka.
- It’s divided into Sectors, each roughly a 200 light-year cube.
- It’s largely free of the Chaos invasions that plague other Segmentums, and instead faces xenos raiders and orks.
- Notable worlds include Krieg, Tallarn, Deliverance, Inwit, and Ophelia VII.
- The Craftworld Iyanden and the Orpheus Sector both sit within its borders.
FAQ
What is Segmentum Tempestus?
It’s one of the Imperium’s five great Segmentums, covering the galactic south. It’s administered from the fortress world of Bakka and divided into roughly 200 light-year Sectors.
What makes Tempestus different from other Segmentums?
It’s far from the Eye of Terror and the Maelstrom, so it avoids a lot of Chaos invasions. Its main problems are xenos raiders, orks, and frontier wars rather than daemonic incursions.
Which famous worlds are in Segmentum Tempestus?
Krieg, Tallarn, Deliverance, Inwit, and Ophelia VII are the headline names, along with Barbarus, Cretacia, Graia, and Praetoria. The Craftworld Iyanden is also located here.
Where is the Segmentum Fortress for Tempestus?
It’s at Bakka, which serves as the region’s naval and administrative centre.