who it had a rivalry with?
The Portuguese.
Spanish Empire
The Portuguese tried in vain to keep secret their discovery of the Gold Coast (1471) in the Gulf of Guinea, but the news quickly caused a huge gold rush. Chronicler Pulgar wrote that the fame of the treasures of Guinea "spread around the ports of Andalusia in such way that everybody tried to go there". Worthless trinkets, Moorish textiles, and above all, shells from the Canary and Cape Verde islands were exchanged for gold, slaves, ivory and Guinea pepper.

The War of the Castilian Succession (1475–79) provided the Catholic Monarchs with the opportunity not only to attack the main source of the Portuguese power, but also to take possession of this lucrative commerce. The Crown officially organized this trade with Guinea: every caravel had to secure a government license and to pay a tax on one-fifth of their profits (a receiver of the customs of Guinea was established in Seville in 1475—the ancestor of the future and famous Casa de Contratación).
how many episodes are in season one of adventure time The first ten episodes were bundled into 30-minute airings. This means two of the eleven-minute segments were combined into one. what is adventure time (season1)? "Adventure Time", an American animated television series. who created it? Pendleton Ward. who is he? He is an American animator, screenwriter, producer, and voice actor. where is he from? He's from San Antonio, Texas and currently resides in Los Angeles. was the last mentioned place ruled by any foreign country? Yes, the area that became Los Angeles was claimed by Juan Rodríguez Cabrillo for Spain. who is the former mentioned person? He was an Iberian maritime explorer best known for investigations of the West Coast of North America, undertaken on behalf of the Spanish Empire. what is this empire? The Spanish Empire, historically known as the Hispanic Monarchy and as the Catholic Monarchy, was one of the largest empires in history.
wiki:12159211
Spanish Empire [SEP] Rivalry with Portugal
The Portuguese tried in vain to keep secret their discovery of the Gold Coast (1471) in the Gulf of Guinea, but the news quickly caused a huge gold rush. Chronicler Pulgar wrote that the fame of the treasures of Guinea "spread around the ports of Andalusia in such way that everybody tried to go there". Worthless trinkets, Moorish textiles, and above all, shells from the Canary and Cape Verde islands were exchanged for gold, slaves, ivory and Guinea pepper. The War of the Castilian Succession (1475–79) provided the Catholic Monarchs with the opportunity not only to attack the main source of the Portuguese power, but also to take possession of this lucrative commerce.