Yes.
Q&A:
A20.55
A20.55 says “Prisoner CC attacks are sequential in that the prisoners may make all of their CC attacks before they can be attacked
in turn ....”. If the prisoners are attacking their guards in a combined attack with other friendly units (who are not prisoners), does
that combined attack get the sequential benefit as well? If yes, if the prisoners attack their guards and non-guards (permitted by
A20.55) in a combined attack with friendly non-prisoners, does the entire combined attack get the sequential benefit?
A. Yes. Yes.