Ordoño II was a king of Galicia from 910, and king of Galicia and León from 914 until his death. He was an energetic ruler who submitted the kingdom of Leon to his control and fought successfully against the Muslims, who still dominated most of the Iberian Peninsula. His reign marked the tactical and smooth transition of the regnum Asturum to the regnum Legionis, with the royal headquarters already established in the city of León.

The Kingdom of León was an independent kingdom situated in the northwest region of the Iberian Peninsula. It was founded in 910 when the Christian princes of Asturias along the northern coast of the peninsula shifted their capital from Oviedo to the city of León. The kings of León fought civil wars, wars against neighbouring kingdoms, and campaigns to repel invasions by both the Moors and the Vikings, all in order to protect their kingdom's changing fortunes.