Question: The Battle of Aclea occurred in 851 between the West Saxons led by Æthelwulf, King of Wessex from 839 to what year, and the Danish Vikings?
Sentence (from "Æthelwulf"): Æthelwulf (Old English for "Noble Wolf"; died 13 January 858) was King of Wessex from 839 to 858.
Relevant evidence: Yes