Battle of Rio Salado
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Battle of Río Salado (October 30, 1340), was a united victory of King Afonso IV of Portugal and King Alfonso XI of Castile over Muslim ruler Abu al-Hasan 'Ali of Marinid dynasty and Nasrid ruler Yusuf I.
This battle was a final attempt of Marinids to invade the Iberian Peninsula. The Marinids had mobilised a vast army and, after crossing the Strait of Gibraltar and defeating a Christian fleet at Gibraltar, then proceeded inland to the Salado River near Tarifa, where they met the Christians. The Marinids suffered a disastrous defeat and moved back to Africa, especially due to the intervention from the portuguese King Afonso IV, the Brave.