WHAT DOES MEDEIVAL FLAG MEAN?

A lot of English and Gascons came all around him from all sides that they cracked open the king’s battle development and smashed it; there were so many English and Gascons that at the very least 5 of such Guys at arms attacked just one [French] gentleman. Sir Geoffroi de Charny was killed Along with the banner of France in his hand, as other Fren