Minho River
Vímara was a vassal of the King of Asturias, Alfonso III, and was sent to reconquer and secure from the Moors (Arabs and Berbers who had invaded Visigothic Hispania), in the west coastal fringe of Gallaecia, the area from the Minho River to the Douro River, including the city of "Portus Cale", later Porto and Gaia, from where the name of Portugal emerged.