**DEPARTMENTO MUNITORUM ARCHIVE: TX-904-YMN**

SUBJECT: Imperium Nihilus Munitorum Records: Yamnin Sector Overview & Astra Militarum Infantry Regiments

CLEARANCE LEVEL: Prioris-Vermillion — Restricted to Commissariat, Lord Generals, and Sector Auditors Only.

THOUGHT FOR THE DAY: "The strength of a fortress lies in the fervor of its defenders; the height of its walls is built upon the stacked bodies of mortal men."

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**SECTION I: SECTOR GEOGRAPHY & PLANETARY ECOLOGY**

Yamnin was originally a boundless steppe world. Over ten millennia, it was terraformed into an agro-fortress world capable of sustaining a singular, monolithic mega-structure.

**Planetary Ecology**

**The Golden Oceans:** 40% of the planetary landmass is designated as central core agri-zones. Endless fields of golden grain stretch to the horizon, bordered by native steppes occupying 20% of the world’s territory. This wilderness—a legacy left by Primarch Jaghatai Khan—serves as the outermost defense buffer.

**Geographical Wonders:** Beyond the grain fields and steppes lies a vast inland sea. Scattered across the landscape are steep, towering sandstone karst pillars blanketed in ancient virgin timber—reminiscent of ancient Terran geological formations.

**The Horizontal Mega-Hive: "Yamnin-Jing" & The Great Ramparts**

Unlike standard Imperial spire-hives that pierce the upper atmosphere, Yamnin features a singular, ground-spanning mega-structure covering 20% of the planet: **Yamnin-Jing**.

**Continental Footprint:** Yamnin-Jing is a rectangular metropolis spanning the width of an ancient Terran continent. It is low-built, consisting of surface heavy-fortress structures over a hundred meters tall and shallow under-hive vaults.

**Unyielding Ramparts:** Built in secrecy under direct decree of the Emperor during the Great Crusade, the hive is encircled by three concentric defense works: **The Yamnin Great Ramparts**. Scaling downward from 1,000 meters to several hundred meters in height, the innermost wall utilizes adamantine plating with ceramite reinforcement; the middle wall uses ceramite over plasteel; and the outer wall is constructed of reinforced plasteel-concrete matrices.

**The Ultimate Secret: The Terran Webway Gate**

At the geometric center of the horizontal mega-hive **Yamnin-Jing** stands a solitary, colossal mountain peak. Crowned by the Sovereign Citadel and Fortress-Palace, its roots extend deep into the world's subterranean dark.

**Linchpin to Terra:** Yamnin was originally commissioned during the Great Crusade as a contingency sub-capital. Deep within the mountain’s lowermost subterranean vaults lies a secret Webway portal—an **ancient, unrecorded Secondary Gate**.

**The Spatial Bypass :** The Webway network is a labyrinthine realm so vast that even the Aeldari have never fully mapped its depths. To safeguard the Imperial Dungeon, this border portal does not plug directly into the warp-infested breach beneath Holy Terra. Instead, it accesses an obscure, independent Webway branch—acting as a stealth shortcut to a secure node in the vicinity of the Sol System.

**The Khan's Mandate:** Primarch Jaghatai Khan and his elite Kheshig guard plunged into the Webway under absolute secrecy from the Emperor, tasked with holding this vital node from within. For ten thousand years, knowledge of this ultimate mandate has been passed purely via oral tradition among an isolated inner triumvirate: the Planetary Governor’s lineage, the Mechanicus Magos, and the Lord Commissar. The local Inquisition remains completely blind to the truth, constantly deploying assassins to monitor the Governor's lineage for suspected heresy.

**to be continued...**

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**SECTION II: ASTRA MILITARUM — YAMNIN REGIMENT RULES**

**Faction Infantry Rules**

**The Unyielding Rampart**

While a **Yamnin Infantry** unit is receiving the benefit of Cover, or is within 6" of an Objective Marker, add 1 to Save rolls made for models in that unit (e.g., a 4+ Save becomes a 3+ Save).

**Sluggish Phalanx**

Yamnin infantry wear heavily layered plasteel-scale armor. The Move characteristic of all **Yamnin Infantry** units is set to 5". Units with this rule cannot declare an **Advance**, and when declaring a **Charge**, subtract 2 from the Charge roll.

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# Yamnin Volunteers（Updated version）

Keywords: Infantry, Battleline, Guardsmen, Yamnin

Points Cost: 100 pts / 10 models

Unit Composition:

* 1 Yamnin Sergeant
* 9 Yamnin Volunteers

M 5" | T 3 | SV 4+ | W 1 | LD7+ | OC 2 | INV 6++

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# RANGED WEAPONS

|Weapon|Range|A|BS|S|AP|D|
|:-|:-|:-|:-|:-|:-|:-|
||||||||
|**"Three-Eyes" Accatran Mk VIIa Lasgun Lance**|18"|2|4+|3|0|1|

**Weapon Keywords:** \[Sustained Hits 1\], \[Torrential Suppression\]\*

**\*Torrential Suppression:** When declaring an attack targeting an enemy **\[Infantry\]** unit, the Attacks (A) characteristic for each model's weapon is modified by +1 (increasing to A 3).

# MELEE WEAPONS

|Weapon|Range|A|WS|S|AP|D|
|:-|:-|:-|:-|:-|:-|:-|
||||||||
|**Bayonet-mounted Standard Sabre**|Melee|1|4+|3|0|1|
|**Stock Strike (Warhammer)**|Melee|1|4+|5|0|2|

* **Weapon Keywords:** \[Lance\]

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**Abilities:**

**Wall Line Defensive:** While receiving the benefit of Cover, stacked faction bonuses improve this unit's Save characteristic to **3+**, and its Invulnerable Save improves to **5++**.

**Glory Grenade (Martyrdom Phalanx):**

**Trigger :** In the Melee phase, each time a model in this unit is destroyed by an enemy melee attack, before that model is removed from play:

**Primary Effect :** Roll a D6. On a 6, the dying soldier detonates the grenade around their neck, inflicting 1 Mortal Wound on the attacking enemy unit.

**Collateral Backblast :** Due to their extremely tight phalanx formation, each time a detonation succeeds (i.e., a 6 is rolled above), immediately roll another D6 for this unit. On a 1–3, the blast wave affects nearby comrades, inflicting 1 Mortal Wound on this squad (this damage can be intercepted/nullified by an adjacent Yamnin Ogryn; refer to the Yamnin Infantry Ogryns Grenadier datasheet).

[OC] Imperium Nihilus Munitorum Records: Yamnin Sector Overview & Astra Militarum Infantry Regiments (Ongoing)