Hundred Years' War English-occupied Calais. In a campaign reminiscent of Crécy, he found himself outmanoeuvred and low on supplies and had to fight a much larger French army at the Battle of Agincourt, north of the Somme. Despite the problems and having a smaller force, his victory was near-total; the French defeat was catastrophic, costing the lives of many of the Armagnac leaders. About 40% of the French nobility was killed. Henry was apparently concerned that the large number of prisoners taken were a security risk (there were more French prisoners than there were soldiers in the entire English army) and he ordered
Battle of Agincourt an army about three times the size of their own fighting force". It is open to debate whether these should all be counted as non-combatants; Rogers (for example) accepts that the French probably had about 10,000 men-at-arms, but explicitly includes one "gros valet" (an armed, armoured and mounted military servant) per French man-at-arms in his calculation of the odds. Soon after the English victory at Agincourt, a number of popular folk songs were created about the battle, the most famous being the "Agincourt Carol", produced in the first half of the 15th century. Other ballads followed, including "King Henry Fifth's