What Happened To Pert's Bodyguards?

I know they were replaced by the Iron Circle because they screwed up at Phall, and also as a personal insult to them. Then at some later point, he started mass producing the Domitar-Ferrum bodyguards as both normal heavy infantry and to serve as his eyes spying on his commanders.

But like...what specifically happened to the honor guard?

Were they executed? Were they left alive just to serve under the automata? Where did they go specifically?