Editing Æthelstan (section)

== Background ==
By the ninth century the many kingdoms of the early Anglo-Saxon period had been consolidated into four: Wessex, Mercia, [[Northumbria]] and [[Kingdom of East Anglia|East Anglia]].{{Sfn|Stenton|1971|pp=95, 236}} In the eighth century, Mercia had been the most powerful kingdom in southern England, but in the early ninth, Wessex became dominant under Æthelstan's great-great-grandfather, [[Egbert of Wessex|Egbert]]. In the middle of the century, England came under increasing attack from [[Viking]] raids, culminating in invasion by the [[Great Heathen Army]] in 865. By 878, the Vikings had overrun East Anglia, Northumbria, and Mercia, and nearly conquered Wessex. The West Saxons fought back under Alfred the Great, and achieved a decisive victory at the [[Battle of Edington]].{{Sfn|Keynes|Lapidge|1983|pp=11–13, 16–23}} Alfred and the Viking leader [[Guthrum]] agreed on a division that gave the Anglo-Saxons western Mercia, and eastern Mercia to the Vikings. In the 890s, renewed Viking attacks were successfully fought off by Alfred, assisted by his son (and Æthelstan's father) [[Edward the Elder|Edward]] and [[Æthelred, Lord of the Mercians]]. Æthelred ruled English Mercia under Alfred and was married to his daughter [[Æthelflæd]]. Alfred died in 899 and was succeeded by Edward. [[Æthelwold of Wessex|Æthelwold]], the son of [[Æthelred of Wessex|Æthelred]], King Alfred's older brother and predecessor as king, made a bid for power, but was killed at the [[Battle of the Holme]] in 902.{{Sfn|Stenton|1971|pp=259–269, 321–322}}

Little is known of warfare between the English and the [[Danes]] over the next few years, but in 909, Edward sent a West Saxon and Mercian army to ravage Northumbria. The following year the Northumbrian Danes attacked Mercia, but suffered a decisive defeat at the [[Battle of Tettenhall]].{{Sfn|Miller|2004}} Æthelred died in 911 and was succeeded as ruler of Mercia by his widow Æthelflæd. Over the next decade, Edward and Æthelflæd conquered Viking Mercia and East Anglia. Æthelflæd died in 918 and was briefly succeeded by her daughter [[Ælfwynn]], but in the same year Edward deposed her and took direct control of Mercia.{{Sfn|Costambeys|2004}}

When Edward died in 924, he controlled all of England south of the [[Humber]].{{Sfn|Costambeys|2004}} The Viking king [[Sitric Cáech|Sihtric]] ruled the [[Scandinavian York|Kingdom of York]] in southern Northumbria, but [[Ealdred I of Bamburgh|Ealdred]] maintained Anglo-Saxon rule in at least part of the former kingdom of [[Bernicia]] from his base in [[Bamburgh]] in northern Northumbria. [[Constantine II of Scotland|Constantine II]] ruled Scotland, apart from the southwest, which was the British [[Kingdom of Strathclyde]]. Wales was divided into a number of small kingdoms, including [[Deheubarth]] in the southwest, [[Kingdom of Gwent|Gwent]] in the southeast, [[Brycheiniog]] immediately north of Gwent, and [[Kingdom of Gwynedd|Gwynedd]] in the north.{{Sfn|Charles-Edwards|2013|pp=510–512, 548}}