 Sustained searches across the thick jungles of Basilan by Spanish authorities finally forced both Samal Chieftains to surrender to the Spanish on July 16, 1857.On July 30, 1859, a royal decree was issued allowing the Jesuits to recover their Missions in Mindanao from the Recollects.A year after, on July 30, 1860, the Spanish government on the Isla de Gran Molucas (Mindanao) was divided into six Police-Military Districts, namely