Ghoul Stars Crusade
The Ghoul Stars Crusade was a Black Templars Crusade in late M41 against the Cythor Fiends of the Ghoul Stars. High Marshal Helbrecht's first command since becoming Chapter Master of the Black Templars, within years the xenos population of the outlying system had been exterminated and the Crusade pushed towards the aliens' homeworld. However when they finally arrived, the Templars found it to be completely empty. Before this mystery could be fully explored, the Black Templars were diverted to the Third War for Armageddon.