The Franco - Breton forces attacked late in the afternoon .
The English longbowmen inflicted mass carnage on the French horses , their dismounted riders being dispatched by the men - at - arms as they struggled to get to their feet under the weight of their armour .
The Franco - Breton forces attacked late in the afternoon and the English longbowmen inflicted mass carnage on the French horses , their dismounted riders being dispatched by the men - at - arms as they struggled to get to their feet under the weight of their armour .