and 300 Borneans. The campaign was one of many, which also included action in Mindanao and Sulu. The Spanish succeeded in invading the capital on 16 April 1578, with the help of Pengiran Seri Lela and Pengiran Seri Ratna. Sultan Saiful Rijal and Paduka Seri Begawan Sultan Abdul Kahar were forced to flee to Meragang then to Jerudong. In Jerudong, they made plans to chase the conquering army away from Brunei. The Spanish suffered heavy losses due to a cholera or dysentery outbreak. They were so weakened by the illness that they decided to abandon Brunei to return to Manila on 26 June 1578, after just 72 days. Before doing so, they burned the mosque, a high structure with a five-tier roof. Pengiran Seri Lela died in August–September 1578, probably from the same illness that had afflicted his Spanish allies, although there was suspicion he could have been poisoned by the ruling Sultan. Seri Lela's daughter, the Bruneian princess, left with the Spanish and went on to marry a Christian Tagalog, named Agustín de Legazpi of Tondo, and had children in the Philippines. In 1587, Magat Salamat, one of the children of Lakan Dula, along with Lakan Dula's nephew and lords of the neighboring areas of Tondo, Pandacan, Marikina, Candaba, Navotas and Bulacan, were executed when the Tondo Conspiracy of 1587–1588 failed; a planned grand alliance with the Japanese Christian-captain, Gayo, and Brunei's Sultan, would have restored the old aristocracy. Its failure resulted in the hanging of Agustín de Legaspi and the execution of Magat Salamat (the crown-prince of Tondo). Thereafter, some of the conspirators were exiled to Guam or Guerrero, Mexico. The Spanish then conducted the centuries long Spanish–Moro conflict against the Sultanates of Maguindanao, Lanao and Sulu. War was also waged against the Sultanate of Ternate and Tidore (in response to Ternatean slaving and piracy against Spain's allies: Bohol and Butuan). During the Spanish–Moro conflict, the Moros of Muslim Mindanao conducted piracy and slave-raids against Christian settlements in the Philippines. The Spanish fought back by establishing Christian fort-cities such as Zamboanga City on Muslim Mindanao. The Spanish considered their war with the Muslims in Southeast Asia an extension of the Reconquista, a centuries-long campaign to retake and rechristianize the Spanish homeland which was invaded by the Muslims of the Umayyad Caliphate. The Spanish expeditions into the Philippines were also part of a larger Ibero-Islamic world conflict that included