How did soldiers know who was who in the melee of Medieval battlefields prior to standardized uniforms?

by Ditka_in_your_Butkus
DanKensington

What could be better than an answer straight from the horse's mouth? His Majesty u/Henry_V_Rex in this thread deigns to offer the contemporary view of the matter.

This also happens to be covered by the VFAQ, specifically this answer by u/vonstroheims_monocle, with additional links further down that thread - though caution should be exercised, as the ones linked are older answers from the dark days of pre-2014.