King Æthelstan was the first King of England, ruling from 924 to 939 AD. He was a grandson of Alfred the Great and played a crucial role in unifying various Anglo-Saxon kingdoms. Æthelstan is known for his military successes, particularly against the Vikings, and for establishing a strong central government. Under Æthelstan's reign, he promoted trade and culture, encouraging the use of the English language and the spread of Christianity. He also issued the first legal codes for England, which helped to standardize laws across the kingdom. His reign is often seen as a pivotal moment in the formation of a unified English identity.