Ethelred I 'the Pious', king of Wessex & Kent

King Ethelred of Wessex (Old English: Æþelræd) (c. 840 – April 23, 871) was the fourth son of King Ethelwulf of Wessex, and an older brother of Alfred the Great. He is sometimes referred to as King Ethelred I of England, but it is open to question whether he should be regarded as a king of England, since in his time the English were still divided into a number of kingdoms, not all of which recognised him as overlord (e.g. Mercia).

http://en.wikipedia.org/wiki/%C3%86thelred_of_Wessex

King after his brother Ethelbert. He He won big over the Vikings at Reading 871. Ethelred died the same year and was succeeded by his younger brother Alfred The Great King

Succeeded his brother Aethelbert. Aethelred's reign was one long struggle against the Danes. Ivarr the Boneless and his brother Halfdan based in Dublin attacked and occupied York in 866 which became a Viking kingdom (Jorvik). The Danes marched south and occupied Nottingham. In 869 they sailed to East Anglia where they killed the local king Edmund. Wessex was then threatened and Aethered and his brother Alfred were engaged in a series of battles with the Danes Ivarr, Halfdan and Guthrun at Reading, Ashdown and Basing. During 870/871 the Danes sacked and plundered their way through the countryside. The next major engagement was at Meretun, in Hampshire, which was an indecisive battle. Aethelred was seriously injured in the battle and died of his wounds at Witchampton, near Wimbourne, where he was buried.

Timeline for King Aethelred I

Historical Timeline 800 - Present

866 

Aethelred becomes king on the death of his brother Aethelbert
869
Edmund King of East Anglia resists the Vikings and is killed
870
Aethelred defeated by the Danes (Vikings) at Reading
871
Aethelred and his brother Alfred defeat the Danes at Ashdown
871
Battle of Meretun, Hampshire. Aethelred is mortally wounded and dies.
http://www.britroyals.com/kings.asp?id=ethelred