Changes

The first purge occurred prior to [[Colchis]] being united with the [[Imperium]], to purge the ranks of the [[Covenant of Colchis|Covenant]] of those who were swaying from the will of Lorgar. Fully a third of the population of Colchis was slaughtered.{{Fn|1a}}

The second purge occurred around a century after the first, following Lorgar's secret betrayal of the [[Emperor]]. The Brotherhood was reformed in order to purge the legion's ranks of all [[Terran]] Astartes, who unfortunately had become corrupted from their initial isolation from their Primarch and were too deeply infected with the lies of the False Emperor.{{Fn|1a}}

The third purge never actually occurred, instead it was halted in its tracks by Lord [[Erebus]] and the [[Dark Apostle]] [[Marduk]]. The Brotherhood was re-formed after the [[Horus Heresy]], for the third time, by the Keeper of Faith, [[Kor Phaeron]]. Lorgar had been sealed away for millennia within the [[Templum Inficio]] on [[Sicarus]] and in his absence the [[Dark Council]] had ruled. Kor Phaeron believed that [[Erebus]] had swayed the council to his will and held too much power within the legion, which he was seemingly molding to his will. The Third Brotherhood was discovered by Erebus and its ringleaders were identified by Marduk, during the dark crusade against [[Boros Gate]]. The Dark Council acted swiftly and put down The Brotherhood. Kor Phaeron, however, was left unchallenged, because he severed all ties with The Brotherhood when the sect was compromised and Erebus was unwilling to challenge the Master of Faith further, explaining to Marduk that such power struggles between himself and Kor Phaeron were common but that they meant nothing.{{Fn|1b}}