 Datu Kalun consolidated the Yakans, led battles against the slave-raiders from Jolo, and rid Basilan's eastern coast of pirates and marauders.With his advanced knowledge of Spanish armaments and military tactics of the day, he commanded a group of Yakan warriors, by then converted to Christianity, as well as some Chavacano conscripts from nearby Zamboanga, and proceeded to subjugate the remaining Yakan tribal leaders in the interior by force of arms.After having consolidated his power over the flourishing Yakan enclave, Don Pedro Cuevas, sent emissaries to the Spanish authorities in Isabela and Zamboanga.