Question: The Battle of Aclea between the West Saxons lead by Æthelwulf and the Danish Vikings resulted in which side winning?

Context paragraphs:
Battle of Bensington: The Battle of Bensington was a major battle fought between Mercia, led by King Offa, and the West Saxons led by Cynewulf of Wessex.  It ended with a victory for the Mercians, and the West Saxons recognizing Mercian overlordship.

Eohric of East Anglia: Eohric (died 902) was a Danish Viking king of East Anglia.  The name "Eohric" is the Old English form of the Old Norse "Eiríkr".  Little is known of Eohric or of the kingdom of East Anglia in his time.  The "Anglo-Saxon Chronicle" recorded that an army from East Anglia raided Mercia and Wessex, and a West Saxon army raided East Anglia in retaliation.  The Vikings met a section of the West Saxons at the Battle of the Holme on 13 December 902, and Eohric was killed.

Æthelberht, King of Wessex: Æthelberht (or Ethelbert; Old English: "Æþelberht" , meaning "magnificent noble") was the King of Kent from 858 and of Wessex from 860 until his death in 865.  He was the third son of Æthelwulf of Wessex and his first wife, Osburh.  In 855 he became under-king of Kent while his father, Æthelwulf, visited Rome.  His brother Æthelbald was left in charge of the West Saxons.  After his father's death in 858 he succeeded him as king of Kent and the other eastern parts of the kingdom.  When Æthelbald died childless in 860, the kingship of the West Saxons also passed to Æthelberht.

Battle of Aclea: The Battle of Aclea occurred in 851 between the West Saxons led by Æthelwulf, King of Wessex and the Danish Vikings.  It resulted in a West Saxon victory.

Æthelwulf: Æthelwulf (Old English for "Noble Wolf"; died 13 January 858) was King of Wessex from 839 to 858.  In 825, his father, King Egbert, defeated King Beornwulf of Mercia, ending a long Mercian dominance over Anglo-Saxon England south of the Humber.  Egbert sent Æthelwulf with an army to Kent, where he expelled the Mercian sub-king and was himself appointed sub-king.  After 830, Egbert maintained good relations with Mercia, and this was continued by Æthelwulf when he became king in 839, the first son to succeed his father as West Saxon king since 641.

Battle of Norditi: The Battle of Norditi (German: "Schlacht bei Norditi" ), Battle of Nordendi ("Schlacht von Nordendi") or Battle of Hilgenried Bay ("Schlacht an der Hilgenrieder Bucht") was a battle between a Frisian army under Archbishop Rimbert of Bremen-Hamburg and an army of Danish Vikings in 884, which resulted in the complete withdrawal of the Vikings from East Frisia.

Battle of Deorham: The Battle of Deorham (or Dyrham) was a decisive military encounter between the West Saxons and the Britons of the West Country in 577.  The battle, which was a major victory for the Wessex forces led by Ceawlin and his son, Cuthwine, resulted in the capture of the Brythonic cities of Glevum (Gloucester), Corinium Dobunnorum (Cirencester) and Aquae Sulis (Bath).  It also led to the permanent cultural and ethnic separation of Dumnonia (Devon and Cornwall) from Wales.

Wulfhere of Mercia: Wulfhere or Wulfar (died 675) was King of Mercia from 658 until 675 AD.  He was the first Christian king of all of Mercia, though it is not known when or how he converted from Anglo-Saxon paganism.  His accession marked the end of Oswiu of Northumbria's overlordship of southern England, and Wulfhere extended his influence over much of that region.  His campaigns against the West Saxons led to Mercian control of much of the Thames valley.  He conquered the Isle of Wight and the Meon valley and gave them to King Æthelwealh of the South Saxons.  He also had influence in Surrey, Essex, and Kent.  He married Eormenhild, the daughter of King Eorcenberht of Kent.

Battle of Hingston Down: The Battle of Hingston Down took place in 838 at Hingston Down in Cornwall between a combined force of Cornish and Vikings on the one side, and West Saxons led by Egbert, King of Wessex on the other.  It resulted in a West Saxon victory.

Battle of Peonnum: The Battle of Peonnum was fought about AD 660 between the West Saxons under Cenwalh and the Britons of what is now Somerset in England.  It was a decisive victory for the Saxons, who gained control of Somerset as far west as the River Parrett.  The location of the battle is uncertain.

Supporting paragraphs: Battle of Aclea Æthelwulf
Answer: West Saxon