I wonder what's keeping Mdama on Requiem with his forces. He's doesn't believe the Forerunners as gods, but he stays at the shield world. He hates humans, and that's why he searched for the Didact to help him, however none of his forces were seen when the Didact attacked Earth. He probably called his forces back to Requiem after the assault on the UNSC Science Station near Installation 03, but for what reason?