Battle of the Yarmuk — Illustration of the Battle of Yarmouk (636) at the bottom of the page of BNF Nouvelle acquisition française 886 fol. 9v (early 14th century). The Saracens are shown with a star and crescent banner, the Byzantines (anachronistically in Crusader era armour) with a star banner. Note that the banner designs are not attributed to factions with any consistency by this illustrator:
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=51788912