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In page Iberian Peninsula:
"For three decades in the 15th century, the Hermandad de las Marismas, the trading association formed by the ports of Castile along the Cantabrian coast, resembling in some ways the Hanseatic League, fought against the latter,[citation needed] an ally of England, a rival of Castile in political and economic terms.[59] Castile sought to claim the Gulf of Biscay as its own.[60] In 1419, the powerful Castilian navy thoroughly defeated a Hanseatic fleet in La Rochelle.[45][60]
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