How did Medieval Soldiers know FRIEND FROM FOE in BATTLE?

How did medieval soldiers identify friend from foe on the battlefield? Looking at heraldry, livery, badges, emblems, banners and tactics. ▼3 extra EXCLUSIVE videos each month on PATREON, which make this channel possible: ▼Facebook & Twitter updates, info, memes and fun: ▼Schola Gladiatoria HEMA - sword fighting classes in the UK: ▼Matt Easton’s website & Pinterest: ▼Easton Antique Arms - antique swords for sale: #medieval #soldier #battles