Basilan Island
By 1898, Basilan Island was administratively divided into three districts, the Spanish-controlled towns of Isabela and Lamitan, and the Tausug trading outpost in Maluso, which the Sulu Sultanate handed-over to Spain, subsequent to the razing and occupation of Jolo by the Spanish from 1876 up to 1899, formalized by the Treaty of 1878.