Which European countries fought the Normans most successfully in the 9th century?

In Europe in the ninth century, the following countries were most successful: Iceland, England, Scotland, Ireland, the Faroe, Hebrides and Shetland Islands.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.