In the XIV century, both feudal states were unable (due to lack of resources) to seize and hold foreign land, where the people did not want to submit to the invaders and were ready to resist them in an organized manner. After the Battle of Hastings in 1066, the Anglo-Saxons lacked the experience of an independent political organization to successfully resist the Normans.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.