Today in the Middle Ages: June 12, 918

Ethelfleda, oldest daughter of King Alfred the Great of Wessex, died on June 12, 918.

Ethelfleda married the lord of Mercia when she was 15 years old. The marriage was both a reward for Mercia's aid to King Alfred in driving the Danes out of Wessex, and a way of diplomatically maintaining Wessex's dominance over Mercia. Alfred awarded his son-in-law the title Earl of Mercia.

After the Earl's death, Ethelfleda ruled Mercia for seven years. When she died, Mercia became part of the Kingdom of Wessex.