Another battle during the "100 years war" was at Verneuil in northern France. The English had to face Italian 'heavy cavalry' whom were wearing the latest Milanese armour, (as were their horses,) ... far superior to most armour plate due to the skill of the hardening and tempering. This made them 'arrow proof'.....but although they did not 'penetrate' ..the constant 'battering' of high velocity arrows must have been un-nerving.
Due to the long period of battle, knights rested .....
http://www.channel4.com/history/micr...s/armour2.html
A little more regarding armour
http://www.channel4.com/history/micr...s/armour1.html
Regards David