Mechanicum – The Lords of Mars in the Horus Heresy
The Mechanicum is a secretive and powerful organization that controls all technology and engineering within the Imperium of Man. During the Horus Heresy, the Mechanicum faction played a pivotal role, supplying powerful war machines, weapons, and technological support to both Loyalist and Traitor forces. Their fusion with technology and access to ancient, destructive constructs make the Mechanicum one of the most technologically advanced and tactically versatile allies on the battlefield. In this category, you will find models of powerful combat units, heroes, and rulebooks that will allow you to command a Mechanicum army on the field of battle.
Mechanicum – Technology and the Power of Machines
The Mechanicum offers a wide array of devastating units and machines that are key to conducting advanced combat operations. Their strength lies in their unparalleled technology and control over powerful automata, capable of annihilating any enemy army.
- Battle-Automata – Mighty combat robots, such as the Thanatar Siege-Automata and Castellax Battle-Automata, which form the devastating core of the Mechanicum's forces on the battlefield.
- Tech-Commanders – Characters like the Archmagos Prime are capable of commanding both machines and men, using cutting-edge technology to gain a tactical advantage.
- Siege Engines – Units like the Triaros Armoured Conveyor and other Mechanicum vehicles provide forces with mobility and protection during the most ferocious battles.

Mechanicum - History and Origins
The Mechanicum, also known as the Adeptus Mechanicus in the later era of Warhammer 40,000, originates from the planet Mars, which is the key center of technology, engineering, and research in the Imperium of Man. During the era of the Horus Heresy and before, Mars became the heart of the Cult of the Omnissiah – the machine god worshipped by all members of the Mechanicum. Mars and its industrial forges (the so-called Martian Forges) were responsible for producing most of the Imperium's advanced technology, from weaponry to colossal war machines like Titans.
The Mechanicum was initially an organization independent of the Imperium, but it forged an alliance with the Emperor as humanity began to rebuild its galactic empire. In exchange for technological support and mass production, the Mechanicum was granted a degree of autonomy and control over its forge worlds, scattered throughout the galaxy.
During the Horus Heresy, Mars became a battlefield for an internal conflict, as factions of the Mechanicum split into loyalists supporting the Emperor and renegades who allied with Horus. The latter became known as the Dark Mechanicum, utilizing forbidden technologies and manipulating the daemonic forces of Chaos.
In short, the Mechanicum hails from Mars, a key planet in the Sol System, home to the largest factories, forges, and the primary source of technology in the Warhammer 40,000 universe.
Mechanicum in the Horus Heresy – Strength and Technology on the Battlefield
The Mechanicum is an ideal faction for players who appreciate technologically advanced units and precise tactics. During the Horus Heresy, this faction was divided between technocrats loyal to the Emperor and those who allied with Horus. Their strength lies in their control over war machines and access to ancient technologies that can decide the outcome of any battle. The Mechanicum knows no bounds when it comes to creating powerful weapons and automata that can change the face of any campaign.
Build Your Mechanicum Army and Dominate the Battlefield
The Mechanicum is a technological powerhouse that can tip the scales of victory in any battle. In this category, you'll find models for units like the Thanatar Siege-Automata, Triaros Armoured Conveyor, and heroes such as the Archmagos Prime, who will grant you a technological edge. If you're looking for an army based on technology, the power of machines, and advanced strategy, the Mechanicum is the perfect choice.