Let me pose this thought...
Just how much was the medieval battle largely a show of strength or brute force yet not necessarily which resulted in death?
'Shock & Awe' the crashing of mounted men at arms against the mass of foot soldiers. Certainly death would have accompanied quite a fair portion of the facing men of the front ranks. Though thinking upon this, death itself a 'factor' may only be reserved for the few and most valiant. I think the instant realization of the 'real' and 'now' possibility of loosing ones life is a choice that is made upon the experience of subjection to Shock & Awe.
No men are so invincible to escape death even at the hand of a poorly equipped peasant they are simply harder to kill...
How do you think you would fare facing an onslaught of impending pain and uncertainty of life?