Battle of Cape St. Vincent (1337) Seville in July 1339, mediated by Maria of Portugal. Among the treaty's provisions was a commitment by Afonso IV of Portugal to assist Alfonso XI of Castile against an impending Marinid invasion force, then assembling in Morocco. This would culminate in the Battle of Río Salado in October 1340. Battle of Cape St. Vincent (1337) The Battle of Cape St Vincent of 1337 took place on 21 July 1337 between a Castilian fleet commanded by Alfonso Jofre Tenorio and a Portuguese fleet led by the Luso-Genoese admiral Emanuele Pessagno (Manuel Pessanha). The fledgling Portuguese fleet was defeated, bringing a quick
Battle of Cape St. Vincent (1641) to reach Cádiz without losing a single vessel and put on alert the Marquis of Ayamonte and Don Gaspar Alfonso Pérez de Guzmán, 9th Duke of Medina Sidonia. Gijsels and Telles returned to Lisbon, where Telles was replaced by Tristão de Mendonça, former Ambassador to the Dutch Republic. The Portuguese fleet then sailed with the French fleet of the Marquis de Brézé, while the Dutch fleet set sail in order to intercept and capture the Spanish West Indies Fleet between the Azores and Cape St. Vincent. It was a hasty maneuver, since the Dutch ships had orders to return to