Complex sentence: A significant number of state governorships came to be held by military men, including General Bernardo Reyes, who became governor of the northern state of Nuevo León, but over the years military men were largely replaced by civilians loyal to Díaz.
Split into simpler sentences: A significant number of state governorships came to be held by military men, including General Bernardo Reyes, who became governor of the northern state of Nuevo León. But over the years military men were largely replaced by civilians loyal to Díaz.