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Regarding English medieval armies, those of c.1300 and of 1415 would actually look very different, certainly in regards to the men-at-arms.
The Scottish wars knights would have worn chain mail and large bucket style helmets.
Fifteenth century knights were clad in plate armour and would have worn angled "dog-faced" bascinet helms, many of them with the visors removed for better visibility.
The Henry V set is one of Strelets finest productions, but it really will not do for the border wars.