The Battle of Crécy in a Fifteenth-Century Manuscript of Froissart's Chronicles
Crécy, 26 August 1346, illuminated by Loyset Liédet more than a century later for a manuscript of Froissart. English archers face Genoese crossbowmen; the armour and the ships are of the illuminator's own day, which is how fifteenth-century readers expected the past to look.
Froissart wrote a generation after the battle from the testimony of men who had been there, and the manuscripts of his chronicle were illuminated a century after that. Neither is an eyewitness record. What Crécy demonstrated, and what the sources agree on, is the rate of fire: a trained archer could loose ten or more arrows in the time a crossbowman managed two, and the English had thousands of them behind stakes on rising ground. The manuscript is in the Bibliothèque nationale de France. See Crécy and the longbow revolution.
Public domain — source (Wikimedia Commons). Free to reuse under the stated licence.