Permanent not Temporary
The POD of this TL is the Malong-Maniago revolt, in this TL alot of the Spanish actions to quell this revolt in its last stages was credited to be against Koxinga and the Spanish revolt when the Spanish had fortified Manila in order to stop the revolts in Luzon affecting the Spanish rule in Manila, in this TL, the Maniago-Malong revolt will be more influential in the history of the Philippines although the Spanish will still remain their hold in the Philippines.
Merdicas
The Merdicas (also spelled Mardicas or Mardikas) were Catholic natives of the islands of Ternate and Tidore of the Moluccas, converted during the Portuguese occupation of the islands by Jesuit missionaries. The islands were later captured by the Spanish who vied for their control with the Dutch. In 1663, the Spanish garrison in Ternate were forced to pull out to defend Manila against the Malong-Maniago revolt (sacrificing the Moluccas to the Dutch in doing so). A number of Merdicas volunteered to help, eventually being resettled in a sandbar near the mouth of the Maragondon river (known as the Barra de Maragondon) and Tanza, Cavite, Manila.