There were several Filipino revolts against Spanish rule between the 16th-19th centuries. The revolts can be categorized into land problems, oppression/unjust taxation, and religious revolts. Notable revolts included Tamblot's Revolt in Bohol (1621-1622), the longest revolt led by Francisco Dagohoy in Bohol (1744-1829), and Diego Silang's revolt in Ilocos (1762-1763). However, most revolts failed due to the absence of a national leader, a lack of nationalism among Filipinos, and inadequate military preparation and training. The Spaniards employed a strategy of "divide and conquer" to weaken revolts