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Battle of the Archaeosaurs

Adeptus Mechanicus

Stories substantially involving the Adeptus Mechanicus through research, their own objectives and conflicts. On Simia, Tech-Priest Logash investigates a Necron tomb; a secondary entry does not imply a Mechanicus viewpoint or one shared war for every book. In Indomitus, Cawl’s cycle remains distinct from the standalone stories Dominion Genesis, Ghosts of Iron and Opportunity Cost: they retain their own events, and the whole lane has no single compulsory reading order.

84 works · one selected story line

connecting to the catalogue · 0
primary secondary placements always shown read
Adeptus MechanicusCalendar dates only where confirmed; other ordering is internal to each story.
The third Ullanor campaign546.M32 · 1
Kotov’s expedition departsThe expedition begins · before Lords of Mars; exact year unestablished. · 1
Noctis · Xuliana Marchentski’s disappearanceThe Marchentski case · before Flesh and Steel · 1
Noctis and Lux · murders and a missing noblewomanNoctis and Lux’s joint case · after the short story · 1
The T’au enclave assault for Objective SkysightReinforcements cut off → assault → the objective returns · 1
The investigation into Migolan’s tainted foodIllness → quarantine → Vega exposed → accusations · 1
The final interrogation and Septimus catastropheAfter Malcorum · recovered memory → catastrophe · 1
Katen Venia and the wreck of the TomiokaAfter Priests of Mars, before Gods of Mars; exact year unestablished. · 1
Exnihilo · the expedition’s climaxImmediately after Lords of Mars · the trilogy’s finale. · 1
The Basiri forge heist on MarsData theft → the Nemonix encounter; position relative to the trilogy unestablished. · 1
Cartographic ReserveDate not established · 19
Halfus: Valel and the Mechanicus armoured columnHalfus · Valel’s ambush and the combined final battle · 1
Deathwatch · the transport crash and Zaeus’s rescueMission failure → crash → help → evacuation → debrief · 1
Balor Secundus: Hekate takes command of a TitanHekate: succession; Gargant battle one week later · 1
Vivaporius Alpha: Tyranids and the Titans’ mind-linkThe Fulvius convoy and Titan mind-link corruption · 1
Artemis: Titan boarding and closure of the warp riftArtemis: EMP, boarding and the Titans’ sacrifice · 1
Gath Rimmon: Valiel’s team is killed and leaves a beaconYears before the Wolves’ expedition; year unknown · 1
Gath Rimmon: the Wolves’ expedition and the Heart’s destructionYears after Valiel’s team is killed; year unknown · 1
Herodian IV: Grendal’s machine and the two Deathwatch landingsHerodian IV · landings, evacuation and the Exterminatus order · 1
Nord and Kale: the search aboard the hive shipMission from the frigate Emathia · the missing scouts · 1
Sarastus: Kill Team Sabatine pursues the Tech-PriestAfter the purging of Gharuda · the descent into Sarastus’s underhive · 1
Theron: Drenn and the floating refinery’s defenceDrenn before joining the Deathwatch · 1
Purge of the Helaj V hiveHelaj V · after the Iron Father’s formative years · 1
The Overfiend’s flagship · Salamanders mission3 · after Shadow Captain, the trilogy’s conclusion · 1
Mechanicus · reopening Velchanos Magna and the invasionReopening the forge world · before Tech-Priest · 1
Velchanos Magna · Torquora’s prolonged warAfter Skitarius · the war continues · 1
Velchanos Magna · Gant and the Kataphron clade’s missionCompanion mission · before the campaign’s outcome · 1
The Mechanicus basilica · the demand to surrender the relicReconnaissance and negotiations → conflict over the Necron relic · 1
Hephaesto: the TekWaaagh invasionHephaesto · ork invasion and Mechanicus defence · 1
Ghostwind: pursuit and the Flayer crisisAfter Carnotika · pursuit of the fleet · 1
Halitus IV: the aerial defence of the Mechanicus refineryAtraxii’s return → the expedition and Oblexus’s rescue; year unknown · 1
Dundas II: Morbus Metallum and the rescue operationPlague outbreak → distress signal → rescue operation; year unknown · 1
Antropia: missing servitors and the reconnaissance flightMissing servitors → Valkyrie reconnaissance; year unknown · 1
Eremet finds the sealed gateBarathrum · the excavation at the crypt · 1
The Mechanicus send reinforcements to ABL 1034ABL 1034 · the reinforcements arrive · 2
The Titans battle the ArchaeosaursABL 1034 · the battle with two Archaeosaurs · 2
Gaerius calls for ExterminatusABL 1034 · dawn after the battle · 1
The ship crashes on Belisarius IVBelisarius IV · after the crash · 1
Regulus calculates the timing of the water runsBelisarius IV · after the crash · 1
Regulus heads for the distant wreckageBelisarius IV · after the crash · 1
Amaryllis reaches the suppliesBelisarius IV · after the crash · 1
Kotir-8: the Skitarii and the Zheng CipherKotir-8 · the Skitarii mission; year unknown · 1
Thain: the Cadians and the Mechanicus objectiveThain · Tyranid battle and the Mechanicus arrival; year unknown · 1
Ashek II Woe Machine InvestigationAfter the Siege of Vervunhive; exact year not published · 2
Cain: the defence of the Simia refineryc. 932.M41, about a year after the Gravalax Incident · 1
Valhallans and the Mechanicus: the underwater investigationAfter Ice Guard; an underwater facility, year unknown · 1
Kaligari Cradle: Redemption Corps operationsThe event date is unknown; late-M41 placement is provisional · 1
The Phrax charter disputeLate M41, before Cadia’s fall · Legacy · 1
Soulspear and the Lakonian persecutionLate M41; the beginning of Sarpedon’s renegade arc; no absolute year published · 1
Invasion of TanakregLate M41; the beginning of Marduk's main arc; absolute year not published · 1
The Necron campaign in the Veiled RegionsLate M41; after Chapter War and before Phalanx; no absolute year published · 1
The Phalanx trial and Abraxes’s incursionLate M41; the six-novel arc's finale after Hellforged; no absolute year published · 1
Golgotha: Operation ThunderstormBefore the Third War for Armageddon; the exact year is unknown · 1
The Reconsecration of Sanctuary 101after Faith and Fire, before Heart & Soul; the main return narrative, not the 897.M41 prologue · 1
Parthus IV: Galleas’s raid for the aeldari artefactAfter the Rynn’s World catastrophe; exact year unknown · 1
Cain: the weapons crisis before retirementbefore retirement, 992.M41; the 487.992.M41 stamp conflicts with the dating in The Greater Good · 1
Glavius: the Zhao-Arkkad projectGlavius’s project before serving Covenant; absolute era and year undetermined · 1
Morod: the Day of Ascension uprisingM42 according to Librum’s review · the Morod uprising; exact year unknown · 1
Confrontation at the Inquisition stationAfter the Great Rift; before The Great Work expedition to Sotha; exact year unknown · 1
The Great Work on SothaAfter the Great Rift; exact year unknown · 1
The Pontus Avernes conclave and Fabius Bile’s raidAfter The Great Work; exact year unknown · 1
Defence of DiamantusEra Indomitus; exact year not published · 1
Attempt on TyberosCarcharodons story; timing relative to Void Exile unknown · 1
Gryphonne IV’s legacy: the search for restoration technologyAfter Gryphonne IV’s fall: three Martian years to the space-hulk expedition; exact year unknown · 1
Sareme: the struggle for Fury of MarsSareme after the Great Rift and the loss of Groal’s expedition; exact year unknown · 1
The last days of LazulaiLazulai’s final days during Leviathan’s renewed attacks; exact year unknown · 1
Undra awakens the Kastelan manipleNicomedua · defending Casus Belli at Az Khalak · 1
Nicomedua: conspiracy aboard Casus BelliOperation on Nicomedua after the Great Rift; exact year not established · 1
The Kastelans engage the boarding partyNicomedua · defending Casus Belli at Az Khalak · 2
Alpha 6-Terror preserves Undra’s matrixNicomedua · defending Casus Belli at Az Khalak · 1
Undra and Alpha 6-Terror regain consciousnessNicomedua · defending Casus Belli at Az Khalak · 1
Sherax’s expedition: the Votann wreckIndomitus: expedition to a Votann wreck; exact year unknown · 1
Cawl’s pylon-code expedition and UlwhaymAfter The Genefather; exact year unknown · 1
Alpha Primus: five questions for a daemonAfter Bile’s raid in Genefather; order relative to Archmagos not established · 1
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Short story / microfictionUnmarkedBattle of the ArchaeosaursBarrington J. BayleyABL 1034 · the reinforcements arrive◎Placement note
Short story / microfiction2001

Battle of the Archaeosaurs

Barrington J. Bayley

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Short story / microfictionUnmarkedBattle of the ArchaeosaursBarrington J. BayleyABL 1034 · the battle with two Archaeosaurs◎Placement note
Short story / microfictionUnmarkedBattle of the ArchaeosaursBarrington J. BayleyABL 1034 · the battle with two Archaeosaurs◎Placement note
Short story / microfictionUnmarkedBattle of the ArchaeosaursBarrington J. BayleyABL 1034 · dawn after the battle◎Placement note
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