He defeated his rival Guthrum at the Battle of Ethandun and Ashdown, after which this man signed the Treaty of Wedmore.
After one victory, this man set about constructing a series of forts known as burhs. Much of the information known about this man comes from his un-official biographer, Bishop Asser. Somewhat like William the Conqueror, this leader compiled a census called the Doom Book that became the foundation of common law in England. He defeated his rival Guthrum at the Battle of Ethandun and Ashdown, after which this man signed the Treaty of Wedmore. For 10 points, name this Anglo-Saxon leader of the late 800's CE, the only English king to bear the epithet "the Great".
After one victory, this man set about constructing a series of forts known as burhs.
Alfred the Great