Changes

During the Heresy, Alpharius (or after his apparent [[Battle of Pluto|death on Pluto]], Omegon) appeared more interested in proving his own Legion's worth by fighting, at every chance he got, the best of the Loyalist legions. Thus, even after Horus was cast down and the Heresy over, the Alpha Legion kept on fighting, moving more and more towards the galactic east, towards the Ultramarines. It was on the world known as [[Eskrador]] that Alpharius -Omegon and Roboute Guilliman would meet for the last time{{Cite This}}.

Believing that Guilliman would adopt his standard Codex deployment procedures, Alpharius -Omegon was surprised by the Ultramarines, as a splinter force including their Primarch made a quick strike at the Alpha Legion's headquarters. Both Primarchs met in combat and Alpharius -Omegon was killed. Believing the combat over, for who could ever survive the loss of their Primarch in battle, the Ultramarines were taken by surprise by the remaining elements of the Alpha Legion, when they struck back a day later. After a week of constant fighting and heavy losses, the Ultramarines strike force managed to reunite with their main elements, and quickly evacuated the planet. Even though they had lost their Primarch, the Alpha Legion had soundly beaten the Ultramarines, who proceeded to bombard their foes' position from outer space. It should be noted, however, that Alpharius's death is still considered suspect even by the Ultramarines, and he may still be at large.{{Fn|2}} Alpharius' apparent earlier death during the [[Battle of Pluto]] during the Heresy complicates the mystery further, as it may have been Omegon who really died on Eskrador, if at all. On the other hand, it is possible that 'Alpharius' did indeed die and 'Omegon' took sole command of the Legion. It is also possible that it was 'Omegon' who was 'killed' by Guilliman after taking the place of 'Alpharius'. Whatever the truth, the Primarch of the Alpha Legion has not been seen since{{Cite This}}.