- a peaceful person.
- a native of Cuba or the Philippine Islands who did not resist the Spanish occupation.
"On December 20 Zapata issued general orders to his Liberating Army of the South to provide 'every class of guarantees in the villages and fields and on the roads,...to respect and aid civil authorities who have been legally and freely elected,' and not to let revolutionary forces or pacificos 'destroy or burn the property of the haciendas, because these will be the patrimony and source of work for the villages.'"
- John Womack, Zapata and the Mexican Revolution
I think in this context it just means "not revolutionary forces".