Which French nobleman commanded the French army as constable at the 1415 Battle of Agincourt?

Charles d'Albret commanded the French army as constable at the 1415 Battle of Agincourt. As Constable of France, he held the kingdom's highest military office and shared command of the French host with Marshal Jean Boucicaut.

The battle took place during the Hundred Years' War, when Henry V of England invaded France. The outnumbered English army used defensive positions and massed longbowmen to disrupt repeated French attacks. Charles d'Albret was killed during the fighting, and the French suffered a major defeat.

A common mix-up is to identify the French king, Charles VI, as the battlefield commander. The king did not lead the army at Agincourt; Charles d'Albret and Boucicaut were the principal commanders present. The defeat weakened French political and military confidence, although the war continued for decades.