This archive tracks four layers. A record present in 1 of them (IND) is silent in the rest, and says so.
The Horus HeresyM30–M31
[RECORD LOST]
No record for this location in The Horus Heresy.
Age of the ImperiumM32–M40
[RECORD LOST]
No record for this location in Age of the Imperium.
The 41st Millenniumpre-Rift
[RECORD LOST]
No record for this location in The 41st Millennium.
Era Indomituspost-Rift
imperium
Attrition war under the Rift's light
A former Industrial World of tens of billions that fell into civil strife and heresy after the Great Rift opened; the Coronal Crusade's Cadian and consolidated regiments grind against the Ruinous Powers here, from Operation Jotunn to the Ruega Front, fought from inside a tank by people who cannot see most of it.
Position
Map frame: 886.6, 306.8 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 432 units ≈ 46k light years, north-east of the galactic core.
Height above the disk plane: 1.2 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Croatoas System
Books set here
2 titles in the reading tracker touch this record, 2 of them as a primary location. Titles link out to the tracker.
Every fact in this record, and where it came from. Editorial derivations say so.
settinghigh
wh40k.lexicanum.com/wiki/Steel_Tread_(Novel ) §Cover Description — 'On the war-torn world of Croatoas, the armies of the Astra Militarum do battle with the twisted servants of the Ruinous Powers'
gposlow
inferred: named in the book's own description and placed nowhere by any published source. No segmentum is claimed; unsurveyed rim, no positional information
setting (Demolisher)high
www.blacklibrary.com/prod-home/new/ebook-demolisher-eng-2025.html Black Library — Demolisher (read 2026-10-02 through its Internet Archive copy of 28 Nov 2025, web.archive.org/web/20251128132700/): 'The war for warp-cursed Croatoas rages on'; Etsul escorts a lord commissar through contested territory 'to stabilise the wavering Ruega Front', with a nemesis 'in the high passes ahead'. Warhammer Community Sunday Preview 23 Nov 2025 (xxrvgot1) and Saturday Pre-orders 29 Nov 2025 (z4npqhea): 'the war-torn and Warp-cursed world of Croatoas'.
historyhigh
wh40k.lexicanum.com/wiki/Croatoas (read directly in a browser 2026-10-02), citing Steel Tread ch. 1: 'once a Industrial World that was inhabited by tens of billions of humans. Once the Great Rift opened however, the planet found itself struggling with civil strife and heresy. The Coronal Crusade was launched to liberate it'. Infobox Class = War World, former Industrial World; Segmentum, Sector, Subsector, System blank (category Segmentum Unknown).
classlow
'forge' (changed from an unsourced 'dead', 2026-10-02) for what the sources say the world IS: a former Industrial World of tens of billions (Lexicanum Croatoas, Steel Tread ch. 1), painted with this dataset's industrial palette as for Garm and Donatos. 'dead' was refused: it draws an airless grey cinder, and both novels put infantry, convoys and high mountain passes ('the high passes ahead', Black Library's Demolisher description) in the open air of a populated war world. The infobox's War World tag is the war, not the look. No terrain or colour word is published beyond the mountains of Demolisher's cover art, so this is low.