Warhammer Fantasy Codexery

Siege of Mordheim

Prosperity turned to ruin when a Chaos-infused comet struck the Middenland city of Mordheim.

The Siege of Mordheim stands as one of the most tragic events in the history of the Empire, marking the fall of a once-prosperous city to the forces of Chaos. Located in the northern province of Middenland, Mordheim was a vital trade hub before it became a cursed ruin known as the City of the Damned. Today, the shattered streets serve as a lawless battleground where mercenary warbands from across the Old World fight for salvage and supremacy. The event transformed a bastion of Imperial order into a permanent zone of conflict, haunted by dark magic and the lingering echoes of the battle that destroyed it.

Key Figure
Cult of the Possessed (and other Chaos warbands)
Outcome
City Destroyed by Comet Impact

Lore & Background

Mordheim was not conquered by siege; it was annihilated when a massive comet, infused with dark magic, struck the city. The impact shattered the metropolis, unleashing a wave of warpstone that corrupted the ruins and twisted the survivors. This lingering corruption prevents normal life from returning, turning the ruins into a place where magic behaves unpredictably and danger lurks around every corner. The fall of Mordheim created a unique geopolitical anomaly. Because no single faction can fully claim the city without suffering heavy losses to both enemy warbands and the ambient magical hazards, it remains a contested frontier. This has fostered a culture of mercenary warfare where loyalty is bought with gold rather than duty to a king or god. The city serves as a grim testament to the fragility of civilization when faced with the relentless tide of Chaos, reminding all who travel there that victory is temporary and ruin is inevitable.

In Their Own Story

Captain Varrick adjusted the strap of his halberd, staring across the fog-choked square. The spire of the old cathedral leaned precariously, its stone cracked by fire and time. Somewhere in the mist, a horn blew—a signal from the rival warband occupying the market district. He signaled his men to move forward. There was no glory here anymore, only gold in the rubble and blood on the cobblestones. Mordheim had died centuries ago; they were just scavengers picking at its bones.

Reader's Guide

The siege began when forces of the Dark Gods, marshaled by the traitorous warlord Sigvald the Magnificent, turned their gaze toward the wealthy Imperial city of Mordheim. Despite a valiant defense led by local commanders and order priests, the walls could not withstand the relentless assault of Chaos warriors and daemonic entities. The city fell after days of brutal combat, resulting in widespread slaughter and the desecration of holy sites. Following the conquest, Sigvald attempted to establish a cult stronghold within the ruins, but the magical corruption left by the battle made the location unstable for long-term occupation. Over time, the Chaos forces withdrew or were repelled, leaving Mordheim as a cursed no-man's-land between the Empire and the Dwarfs. In the centuries since, the city has become a battleground for mercenary warbands seeking salvage and glory. Various factions now vie for control of specific districts, engaging in skirmishes that echo the original tragedy. The event serves as a grim reminder of Chaos's reach into the heart of the Old World.

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