Grammaticus was born on Terra at the close of the 29th Millennium, in the Caucasus region of Eurasia. He had served as a line officer in the Caucasian Levvies, a Unification Wars-era military force that had allied with the Emperor during that great conflict. During a victory ceremony after the Imperial forces defeated the Panpacific Empire, he met the Emperor, who recognised that Grammaticus was a man somewhat like him, and who said that they should have a discussion about the paths open to men with their particular "talents." This second meeting never transpired, however, as Grammaticus lost his life when he was hit by a groundcar at Anatol Hive shortly after.