From Lexicanum

Captain Cato Sicarius is the Second Company Captain of the Ultramarines Chapter. Among his titles are Master of the Watch, Knight Champion of Macragge, Grand Duke of Talassar, and High Suzerain of Ultramar.

Born into one of Talassar's ascendant houses, Sicarius, as soon as he was old enough has been training in various forms of Martial Arts by Talassi nobility, which later was a major factor of how he was recruited to learn the way of the Ultramarines. Sicarius excelled at his training and won many commendations and rose through the ranks of the training camp.

Sicarius rose to the rank of Sergeant and later rose to the rank of being the Knight Champion of Macragge. Sicarius took the mantle of being Company Captain and in his first actions took place in the Dantaro Campaign.

During many campaigns Sicarius gained many honors, the most famous ones being the Imperial Laurel after the Crusat Minor Planet Strike (733.M41), the Honorifica Valorum after the Battle of Dyzanyr. Also during a nine-day battle Sicarius gained the Valor Crest in the Battle for Fort Telendrar, which is only awarded for near-suicidal acts of bravery. The colours of the crest are those of which the Noble House Sicarius was recruited from.²

Sicarius wears a suit which descends from the original armour worn by Captain Orar, who was an Ultramarine captain who won great renown quickly after the Horus Heresy. The left shoulder pad is that of the actual armour of Captain Orar, which includes the 2nd Company's heraldry colours, an Iron Halo, the Ultramarines Chapter Icon and a Gold Aquila which marks Sicarius as the Grand Duke of Talassar.

Soon after Sicarius became captain he was announced the Suzerain of Ultramar in 849.M41 which allowed him to gain control within the Ultramarines hierarchy².

Hero of the Medusa V Schism, Sicarius's first mission was to deploy his forces across the planet in defensive formations and to release his vessels to hunt down any space traffic that might be related to enemy forces of Orks, Eldar, Tyranids, Tau and Chaos. After a long and bloody campaign Sicarius issued an Exterminatus for the dying planet.³

Sicarius's most famous battle to date stands as the Assault on Black Reach¹ against the Ork Warlord Zanzag. The whole of the 2nd Company stood against ten thousand Orks. As their ammunition ran dry the Ultramarines fought with knife and chain sword until the last Ork fell.

During the epic space battle in the Halamar Rift, the Strike Cruiser Valin's Revenge destroyed most of the Chaos Space Fleet, but during the battle aboard the main Chaos vessel Sicarius failed to kill the Daemon Prince M'Kar, who escaped back to the Eye of Terror.²

On the resource rich planet of Damnos in the year of 974.M41, Sicarius led an Ultramarine assault onto the planet against the recently risen menace known as the Necrons. Sicarius split the 2nd Company in the three separate squads; he led one against the heart of the Necron force at Kellenport's Outer Walls. Upon landing Sicarius's team was surrounded by phalanxes to guard the Necron Lord. During the battle Sicarius fell, gravely wounded by the Lords War Scythe but was rescued and was evacuated back to his Battle Cruiser to heal. Damnos was lost to the Necrons but due to the unstable reactor of the planet and thanks to a few Thunderhawk Gunships the reactor blew and took the Necrons and Planet to their deaths.¹,²

After months of healing and finally returning to active duty Sicarius led the Ultramarines and thirty other Space Marine chapters and Imperial Guard forces during the Zeist Campaign against the invading forces of the Tau Empire. The Tau was expanding their empire on to Imperial Worlds, of which they had captured 26 worlds. Numerous forces from the Night Watch, Halo Dragons, Silver Skulls, Crimson Fists and numerous others joined Sicarius on Praetonis V to stop the incoming forces. Sicarius fought back with the same tactics that the Tau used, being speed and precision. The combined Astartes strike-force managed to reclaim all the worlds annexed by the Tau and obliterate the invading forces, although the high council withdrew the chapters before the strike-force could launch a counter-assault on Tau occupied worlds; a much larger battle was brewing.²

Upon returning to Macragge the siege against Ultramar was already underway by the M'Kar The Reborn and the forces of Chaos, starting with the Planet Talassar. Each company of Ultramarines were dispatched to all planets that were under attack, although Marneus Calgar himself accompanied Sicarius and the 2nd Company to defend the storm-wracked planet. After a long and perilous battle M'Kar was finally defeated by Calgar, who swore to slay M'Kar a hundred times over if need be. ²

Sicarius still leads the Ultramarine 2nd Company to this day, and it is believed by many he may be the heir to Marneus Calgar's position as Chapter Master of the Ultramarines.²

Equipment

In combat, Sicarius wears the Mantle of the Suzerain, a type of finely crafted Artificer armor, as well as a Plasma pistol and the Talassarian Tempest Blade, a power sword which he wields with expert proficiency.

Sources

• ¹:Warhammer 40,000 5th Edition Rulebook
• ²:Codex: Space Marines (5th Edition)
• ³:WD317 - history extracted from the Medusa campaign section