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
contested
Imperial world under assault by the forces of Slaanesh
An Imperial world of the Angriff System, ruled from its capital Algidus, where Castellan Garran Crowe's Grey Knights, Justicar Styer, Canoness Setheno's Sisters of Battle and Inquisitor Furia fight daemons and Noise Marines of Slaanesh in Castellan's last act.
Position
Map frame: 348, 252 in the archive's 0–1000 disk space (core at 500, 500).
Distance from the core: 291 units ≈ 30.9k light years, north-west of the galactic core.
Height above the disk plane: 4.0 units — invented thin-disk jitter, deterministic per record. No published source gives any location a z coordinate.
System: Angriff System
Books set here
1 title in the reading tracker touches this record. Titles link out to the tracker.
Every fact in this record, and where it came from. Editorial derivations say so.
identityhigh
wh40k.lexicanum.com/wiki/Garran_Crowe (read directly in a browser on 2026-10-03), citing Castellan: the Grey Knights 'moved to what they suspected was the next target: Angriff Primus as its Governor, Vismar, was consumed by madness and allied with a band of Noise Marines under their champion, Tarautas. Together, the heretics were able to open a Warp Rift at Angriff Primus' capital of Algidus' (ch. 11); the battle and The Masque (chs. 15-16); 'all of Angriff was then consumed by the destabilizing Warp Storm' (Epilogue). Also https://wh40k.lexicanum.com/wiki/The_Masque ('the battle for Angriff Primus', chs. 15-16) and the Grey Knights timeline '???.M42 - Battle against The Masque and Noise Marines on Angriff Primus' (chs. 15-16). The Lexicanum pages Angriff_Primus, Angriff_System, Algidus and Vismar do not exist (checked 2026-10-03); a full-text search for 'Angriff' returns those three pages only. NAME-COLLISION CHECK: no index record uses the id or label.
book-joinhigh
VISITED for Castellan (grey-knights::gk-crowe::2): the setting of chapters 11-16 and the Epilogue (Lexicanum Garran_Crowe). Sandava III, named in the publisher's description, is the book's PRIMARY.
segmentummedium
wh40k.lexicanum.com/wiki/Nachmund_Gauntlet obscurus, by inference: Lexicanum Garran_Crowe puts the strike cruiser Tyndaris in the Nachmund Gauntlet when 'the Grey Knights discovered that more systems in the region were being moved' (ch. 9), and the next target they go to is Angriff Primus (ch. 11); places the Gauntlet 'in Segmentum Obscurus'. No source names Angriff's segmentum directly.
classlow
'temperate', editorial, NOT a citation: no permitted source describes Angriff Primus's surface. It has a Planetary Governor, a capital (Algidus) and a palace, so it is an inhabited world; temperate is the dataset's neutral inhabited-world palette (as for nikaea and helwain). The Lexicanum page does not exist, so there is no infobox tag either way.
gposlow
inferred: placed in the Nachmund Gauntlet beside Vigilus (the Gauntlet's anchor in regions.json crossings), 24 units off it at [348, 252]; the offset is editorial and asserts only 'in the region of the Nachmund Gauntlet' (Lexicanum Garran_Crowe chs. 9, 11). The Gauntlet's own worlds are mostly unplaced on this map, so nothing better is available. Z 4 is the zPolicy value (compute-z.mjs angriff-primus 348 252). No riftSide is declared.
erasmedium
indomitus only: the Grey Knights timeline dates the battle '???.M42', after the Great Rift (Castellan chs. 15-16). Allegiance 'contested': an Imperial world under Chaos assault, its Governor among the heretics (ch. 11; kept out of the era text as a mid-book turn). Its end in the Epilogue is kept to the catalogue SPOILERS field and out of the status, which therefore names no destruction.
systemIdmedium
'angriff': Lexicanum Garran_Crowe 'all of Angriff' (Epilogue). No system survey (no-system-survey): canon names no star, no other body and no body count, and the world is not the book's PRIMARY.