Suspicious Sigillite

The primarch nods slightly, in acknowledgement of the question.

‘Roboute claimed he could bring Compliance within months. I brought it within weeks.’

‘That is an admirable justification after the event,’ the first questioner states. ‘Unless you have a gift of precognition, it does not provide an explanation for your actions at the time.’

The faintest hint of a chuckle emerges from within the pri­march’s helm. ‘A fair point. I ignored Roboute’s demands because his vision of war, like the rest of my brothers’, is blinkered. They see war as a purely martial pursuit, the setting of warrior against warrior in order to establish dominance.

‘They each pursue it in a different manner, of course. Corax and the Khan seek to bleed the enemy through a thousand cuts. Rogal wishes them to break themselves on his strength, Perturabo breaks theirs instead. Angron overwhelms with utter force and ferocity, Russ does the same, albeit with a tighter focus. Roboute, the Lion, Horus – they all use their gifts, and their gifts are tremendous, to bring the enemy to battle where they wish, and then outmanoeuvre them mentally as well as physically in order to bring victory.’

His Primarch's name is Magnus. Magnus is literally just "Magus" with an N. And majus (مجوس) is literally an Arabic anti-Persian slur. It comes from the Persian majūs, a Zoroastrian priest. Means "fire-worshipper" and implies that a person is not a real Muslim. Still used against Shi'a Muslims and Iranians in general as an ethnic slur today.

Vulkan

Guilliman Faces Fulgrim

Some squeaky clean Imperial Propaganda. Cross-posting these on here after I shared them on Reddit last night.