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In page Afonso I of Portugal:

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Afonso then turned his arms against the persistent problem of the Moors in the south. His campaigns were successful and, on 25 July 1139, he obtained an overwhelming victory in the Battle of Ourique, and straight after was (possibly unanimously) proclaimed King of the Portuguese by his soldiers, establishing his equality in rank to the other realms of the Peninsula, although the first reference to his royal title dates from 1140.[citation needed]