During the 19th century some criollos (particularly in Oriente, the island's poorer, eastern region) became increasingly disenchanted and desired greater autonomy.
During the 19th century some criollos succeeded in their rebellious activities. 
mnli hypothesis: During the 19th century some criollos succeeded in their rebellious activities.  premise: During the 19th century some criollos (particularly in Oriente, the island's poorer, eastern region) became increasingly disenchanted and desired greater autonomy.