This archive tracks four layers. A record present in 4 of them (HH, AoI, M41, IND) is silent in the rest, and says so.
The Horus HeresyM30–M31
contested
The Throneworld's gate; the Titandeath
The principal world of the Beta-Garmon cluster, through which stable warp routes run straight into the Sol System — hold it and you hold the road to Terra. The largest massed Titan battle ever fought was contested here in 013.M31.
Age of the ImperiumM32–M40
imperium
[RECORD LOST]
[RECORD LOST]
no published source we could verify records the cluster's condition between the Scouring and M41.
The 41st Millenniumpre-Rift
imperium
Imperial garrison cluster
Still the strategic hinge on Terra's doorstep: the warp routes that made it worth a Titan war in M31 still run into Sol.
Era Indomituspost-Rift
imperiumImperium Sanctus
Imperial garrison cluster
Inside Imperium Sanctus and close enough to Terra that its lanes matter more than ever now that so many others have closed.
Position
Map frame: 300, 515 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 201 units ≈ 21.3k light years, west of the galactic core.
Height above the disk plane: -3.3 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Beta-Garmon System
Books set here
3 titles in the reading tracker touch this record, 2 of them as a primary location. Titles link out to the tracker.
derived: 'home to stable Warp routes that allow for entry into the Sol System' (Lexicanum:Beta-Garmon_Star_Cluster) — placed a short hop east of Terra, between Terra and the core, as the approach the traitor advance had to take
classhigh
wh40k.lexicanum.com/wiki/Beta-Garmon_Star_Cluster 'Beta-Garmon II - Capital of the Beta-Garmon system. Radiation-blasted Industrial World/Fortress World' (citing Titandeath ch. 12). Painted `fortress` — armoured grey rock — and not `forge`: canon's compound tag leads with Industrial, but the words that describe the surface are radiation-blasted and fortified (Dorn refortified the cluster, and the largest Titan battle of the Heresy was fought over it), while the forge palette paints a manufactorum-lit world this one is not. Upgraded from an editorial low-confidence guess on 2026-09-14, when Raldoron: Revenant sent us back to the cluster article.