Lady of the Mercians, who was an outstanding strategist. In the middle of the ninth century, almost the entire European continent was under Viking rule. Aethelflaed, Lord of the Mercians, who led her people to drive the Vikings out of her territory! Aethelflaed built fortresses in Mercia that the Vikings could not capture. In several wars, she defeated Viking invasion with her superb military and tactical talents. And Aethelflaed captured Vikings stronghold in Wales, thus Vikings who settled in York swore allegiance to her for protection. Aethelflaed is a heroine with heroic spirit, known as Lady of the Mercians.