When two medieval armies clashed, what happened to the fallen? Would the victors send the bodies back home? Would they just mass grave everyone? Or was it dependent on where and who was fighting?
It does not completely answer your question, but you may find this thread about the winning side pilfering the bodies interesting.
Edit: the bot said I should page /u/trinity, the original commenter of that thread, so that they may have credit and add additional information if they desire.