Complex sentence: By August 30, the revolt had spread to eight provinces, prompting the Spanish Governor-General Ramón Blanco, 1st Marquis of Peña Plata, to declare a "state of war" in these provinces and place them under martial law.
Split into simpler sentences: By August 30, the revolt had spread to eight provinces. On that date, Governor-General Blanco declared a "state of war" in these provinces and placed them under martial law.