>>5371433Still looking for more information but we know at least for the Custodes, Dreadnought technology has existed since at least the Unification Wars. Sagitarrus was the first Custodes to die during the battle of Maulland Sen, for which he was interred in a custodes dreadnought.
I'm also looking up the exact quote from the Horus Heresy, but the old technobarbarian tribe of Albia had "Proto-Dreadnoughts" in their armies.
This means at least the concept exists for TalOS to draw inspiration from.
