No, it's in 1515, "long" after the Hundred year wars, during the Italy wars (the 5th to be more precise). Marignano was a battle between the French and the Swiss. It was quite an important battle, as one of the few defeats of the Swiss, who had quite a reputation of invincibility at the time
Bayard was the perfect knight, "sans peur et sans reproche" (without fear or reproach). He was very famous, although not a noble, and after the battle, the king François 1er who was only 20, asked to be knighted by him, to honour him as Bayard (whose real name was Pierre Terrail) imporsonated all the ideal of chivalry.