Athelstan was born in 893. Athelstan created the king of the Wessex state in 927.
Athelstan has brilliantly directed the greates Wessex army left by his father as an inheritance. And Athelstan conquered the whole of Mercia. And thanks to Athelstan, England was united under a single state. That is why Athelstan is the first king of England.
Besides, Athelstan has made great struggles against the Vikings. The British army defeated the Vikings, even though their numbers were few. After these wars, the Vikings were forced to leave England.
Athelstan died in 939.