Excerpts from Books and Wikipedia
"Alfred the Great (...) was King of Wessex from 871 to c. 886 and King of the Anglo-Saxons from c. 886 to 899. He was the youngest son of King Æthelwulf of Wessex. His father died when he was young and three of Alfred's brothers, Æthelbald, Æthelberht and Æthelred, reigned in turn.
After acceding to the throne, Alfred spent several years fighting Viking invasions. He won a decisive victory in the Battle of Edington in 878 and made an agreement with the Vikings, creating what was known as the Danelaw in the North of England. Alfred also oversaw the conversion of Viking leader Guthrum to Christianity. He defended his kingdom against the Viking attempt at conquest, becoming the dominant ruler in England. Details of his life are described in a work by 9th-century Welsh scholar and bishop Asser.
Alfred had a reputation as a learned and merciful man of a gracious and level-headed nature who encouraged education, proposing that primary education be conducted in English rather than Latin and improving the legal system, military structure and his people's quality of life." [Wikipedia]