The tragic events of the Dornian Heresy saw their Primarch Horus slain and the Emperor mortally wounded at the hands of the Arch-Betrayer Rogal Dorn. The history of the Black Templars is the history of the ambition of the Imperium itself, and the flaws that broke its founder's dreams of unification and glory for all Mankind asunder. Horus was also granted the title 'Warmaster', commander-in-chief of all the Emperor's armies. In honour of Horus' great achievements during the Great Crusade, following the Imperial victory over the Orks during the Ullanor Crusade, the Emperor suggested that the Legion be renamed the Sons of Horus. They exemplified what an Astartes was supposed to be brutal, ruthless and unwavering but also honourable, and were considered the most favoured servants of the Emperor of Mankind. The XVI Legion was loyal beyond question, and their master was lauded above all others. Before the dark days of the Dornian Heresy they fought at the Emperor's side on Terra and through the early years of the Great Crusade. Born as the XVI Legion on Terra, they would first rise to greatness under the name of the Luna Wolves. The Black Templars are a Loyalist First Founding Space Marine Legion. (Fedelitas Totalis) ' The galaxy is the Emperor's, and anyone or anything who challenges that claim is an enemy who must be destroyed.' - High Marshal Helbrecht at the Battle of Fire and Blood

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