If I may, I'd like a follow up question about Greek post-battle practices: I saw a movie (I think it was Oliver Stone's Alexander but my memory is fuzzy ATM) where at the conclusion of a battle a Greek medic walks among the wounded with a kit which included a hammer and awl; it's implied that this is for euthanizing gravely wounded soldiers who have no hope of recovering.

Was this kind of battlefield medicine actually practiced? or was it an invention of the movie?

Partially related to this - were there any battles similar to the opening of "Troy", where leaders would really put forward their best fighter to settle an engagement and save lives?