fight violence and try to establish peace in (a location)(verb.creation)
Example: The U.N. troops are working to pacify Bosnia.
source: wordnet30
To make to be at peace; to appease; to calm; to still; to quiet; to allay the agitation, excitement, or resentment of; to tranquillize; as, to pacify a man when angry; to pacify pride, appetite, or importunity.(verb)