Spanish Conquistadors - Iberian Union Period (1580–1640)

Iberian Union Period (1580–1640)

In 1578 the Saadi sultan Ahmad al-Mansur, contemporary of Queen Elizabeth I, defeated Portugal at the Battle of Ksar El Kebir, beating the young king Sebastian I, a devout Christian who believed in the crusade to defeat Islam. Portugal had landed in North Africa after Abu Abdallah asked him to help recover the Saadian throne. Abu Abdallah's uncle, Abd Al-Malik, had taken it from Abu Abdallah with Ottoman empire support. The defeat of Abu Abdallah and the death of Portugal's king led to the end of the Portuguese Aviz dynasty and later to the integration of Portugal and its empire at the Iberian Union for 60 years under Sebastian's uncle Philip II of Spain. Philip was married to his relative Mary I cousin of his father, due to this, Philip was King of England and Ireland in a dynastic union with Spain.

As a result of the Iberian Union, Phillip II's enemies became Portugal's enemies, such as the Dutch in the Dutch–Portuguese War, England or France. War with the Dutch led to invasions of many countries in Asia, including Ceylon and commercial interests in Japan, Africa (Mina), and South America. Even though the Portuguese were unable to capture the entire island of Ceylon, they were able to control its coastal regions for a considerable time.

From 1580 to 1670 mostly, the Bandeirantes in Brazil focused on slave hunting, then from 1670–1750 they focused on mineral wealth. Through these expeditions and the Dutch–Portuguese War, Colonial Brazil expanded from the small limits of the Tordesilhas Line to roughly the same borders as current Brazil.

In the 17th century, taking advantage of this period of Portuguese weakness, the Dutch occupied many Portuguese territories in Brazil. John Maurice, Prince of Nassau-Siegen was appointed as the governor of the Dutch possessions in Brazil in 1637 by the Dutch West India Company. He landed at Recife, the port of Pernambuco, in January 1637. In a series of expeditions, he gradually expanded from Sergipe on the south to São Luís de Maranhão in the north. He likewise conquered the Portuguese possessions of Elmina Castle, Saint Thomas, and Luanda and Angola. The Dutch intrusion into Brazil was long lasting and troublesome to Portugal. The Seventeen Provinces captured a large portion of the Brazilian coast including the provinces of Bahia, Pernambuco, Paraíba, Rio Grande do Norte, Ceará, and Sergipe, while Dutch privateers sacked Portuguese ships in both the Atlantic and Indian Oceans. The large area of Bahia and its city, the strategically important Salvador, was recovered quickly by an Iberian military expedition in 1625.

After the dissolution of the Iberian Union in 1640, Portugal re-established authority over its lost territories including remaining Dutch controlled areas. The other smaller, less developed areas were recovered in stages and relieved of Dutch piracy in the next two decades by local resistance and Portuguese expeditions.

Spanish Formosa was established in Taiwan, first by Portugal from 1544 and later renamed and repositioned by Spain in Keelung. It became a natural defence site for the Iberian Union. The colony was designed to protect Spanish and Portuguese trade from interference by the Dutch base in the south of Taiwan. The Spanish colony was short-lived due to the unwillingness of Spanish colonial authorities in Manila to defend it.