|Ambiguous Term? This article is about the Imperial Warmaster. For other uses of Achilus, see Achilus (disambiguation).|
Tiber Achilus was an Imperial Warmaster and before that a Lord Militant of the Imperial Guard. Originally commander of the Achilus Crusade, he was lost aboard his Grand Cruiser after a Gellar Field malfunction occurred while in Warp transit. He was succeeded as commander of the Crusade by Lord General Militant Solomon Tetrarchus.