Of particular note is the inclusion of the Neutron-flux Warheads, a Terran development dating back to the years prior to the Emperor's alliance with Mars. The Arcus was intended to become the cornerstone of a new tactical doctrine the Master of Ultramar had begun to formulate, allowing small Legiones Astartes forces to operate without extensive support and in smaller numbers than during the Great Crusade.ĭespite production of the Arcus being limited to a few prototype vehicles at the onset of the Horus Heresy, and the doctrinal issues that kept it out of production on most major Forge Worlds, a number of Legion homeworlds produced small numbers of this variant.

The Sicaran hull was chosen to mount the newly developed Arcus Launcher, which was capable of deploying with a wide range of warheads, each crafted to fulfil a distinct tactical niche during combat. The Arcus Strike Tank was originally part of a program once initiated by the Primarch of the Ultramarines Legion, Roboute Guilliman, seeking to grant a Legion strike force access to highly specialised weapon systems without the need to employ numerous vehicles for each role. The Sicaran Battle Tank was an Imperial main battle tank and one of the most advanced armoured vehicles ever used by the Imperium, and the Arcus variant was no different. The Arcus Launcher is a rotary missile launching system that was once use by the Space Marine Legions on their Sicaran Arcus Strike Tanks during the Great Crusade and the Horus Heresy in the late 30th and early 31st Millennia.

Deathwatch sicaran battle tank