Hm... so anything they learn is all mental and not physical. Still not sure how the army is benefiting from the rewind unless they're aware of the rewind. Maybe i'm just misunderstanding how the timestone is working here.
So Tom's entire team has been stuck in a time loop for over 10 years dying and reviving but dru has been stuck in the mirror dimension for 10 hrs hopefully the author won't tell use after this chapter that she's still the strongest person after him