Ahhh... Now I get you, you mean looting the battlefield afterwards?
That was common enough back then, Hannibal being the most famous by giving his Libyan troops Triarii equipment after Lake Trasimene. But just remember that not all horses would be able to carry the armour.
But that would be hard to do with the game... A lot of variables, Ithink you have to wait a while. At best you could perhaps expect future installments to grant you some money from the loot (sold armou and weapons could generate a lot of money) and prisoners.