They say that Charlemagne contributed to the strengthening of Kievan Rus. Is it possible? How could Karl influence Russia?

Having defeated the Avar Kaganate at the end of the 8th century, Charlemagne helped Kievan Rus become a great power.

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.