Ramiro II (c. 900 – 1 January 951), son of Ordoño II and Elvira Menendez, was a King of León from 931 until his death. Initially titular king only of a lesser part of the kingdom, he gained the crown of León (and with it, Galicia) after supplanting his brother Alfonso IV and cousin Alfonso Fróilaz in 931. The scant Anales castellanos primeros are a primary source for his reign.
He actively campaigned against the Moors, who referred to him as the Devil due to his ferocity and fervor in battle. He defeated the hosts of the Umayyad caliph, Abd al-Rahman III, at the Battle of Simancas (939).
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Succession
When, shortly before his death in 910, Alfonso III of Asturias was forced by his sons to abdicate, the Kingdom of Asturias descended into a period of successional crises among the royal family and their supporters from the regional marcher aristocracies. The kingdom was initially partitioned, with García I receiving León, Ordoño II Galicia and Fruela II the Asturian heartland.
With the successive deaths of García I (914) and Ordoño (924), these were re-consolidated, Fruela ruling the entirety of what would thenceforth be referred to as the Kingdom of León. His death the next year, 925, again brought about disputed succession and partition. A younger brother, Ramiro, appears to have married Fruela's widow and adopted the royal title, but gained no traction. Instead it was the next generation that rose to the forefront.





