Survivorship bias 2000BC
Survivorship bias 2000BC
If they made it home after taking battlefield wounds to their face and head, they’re pretty much immune to physical damage already.
Just make sure they stay hydrated and appropriately fed so they can continue their carnage.
Actually this reminded me of a documentary or something I’ve read a while back.
The leading cause of death in armies has long been infectious diseases, not combat injuries.
Poor sanitation, overcrowded camps, contaminated water, malnutrition - this all lead to massive outbreaks of disentery, typhoid, pneumonia, malaria, etc etc, that caused more casualties than actual combat, depending on campaign conditions.