In this era, the Space Marines operated very differently than in the late 41st Millennium.

Along with its sister tank, the Falchion, the Fellblade was one of the most powerful and most feared weapons used during this ancient time. The Fellblade was most widely used by the Space Marine Legions, yet also saw limited use by the Imperial Army and other Imperial forces like the Mechanicum. Many of the technologies used in the construction of the Fellblade were all fruits of archeotech first developed during the Dark Age of Technology and restored to humanity by the later conquests of the Emperor of Mankind's Great Crusade. The Fellblade was by far the more advanced design of the three, featuring many technologies that were unique to its construction, such as compact Mechanicum Atomantic Arc-reactor technology, a reinforced metaplas alloy chassis that provided protection superior to that of nearly all other Imperial armoured vehicles, and an advanced Accelerator Cannon as its primary armament. It was based upon the same Standard Template Construct (STC) design as the mighty Baneblade and Deathhammer super-heavy tanks that formed the mainstay of the vast armoured brigades of the Legiones Astartes and the Imperial Army during the Great Crusade and later, the Horus Heresy. The Fellblade was a highly advanced pattern of Imperial super-heavy main battle tank. Chaplain Varr Shen, Salamanders Space Marine Chapter, Battle of Shaprais, Badab WarĪ Fellblade of the World Eaters Legion during the Great Crusade Their presence links us to our past, for once these lordly engines bestrode the same battlefields as our Primarch himself, cast fire upon the same foes as he, and shaped history itself as a smith bends otherwise unyielding steel to his will.' ' Look upon these behemoths of iron, my kin, and give thanks they stand by your side this day.

Alpharius sicaran battle tank