 Complete the following phrase:  Guthrum , c. 835  c. 890 was King of East Anglia in the late 9th century. Originally a native of what is now Denmark, he was one of the leaders of the Great Summer Army that arrived in Reading during April 871 to join forces with the Great Heathen Army, whose intentions were to conquer the kingdoms of Anglo-Saxon England. The combined armies were successful in conquering the kingdoms of East Anglia, Mercia, and Northumbria, and overran Alfred the Greats Wessex, but were ultimately defeated by Alfred at the 