King Athelstan was the first King of England, ruling from 924 to 939 AD. He was the grandson of Alfred the Great and played a crucial role in uniting various Anglo-Saxon kingdoms. Athelstan is known for his military successes, particularly in battles against the Vikings, which helped to secure his reign and expand his territory. During his rule, Athelstan implemented important legal reforms and promoted trade and culture. He is also credited with establishing a strong central government and fostering relationships with neighboring countries, including Scotland and Wales. His reign is often seen as a significant turning point in English history.