Sentence:  She stared at us. “Hardly. You must be from far off, not to know about Quantrill′s raids. Last March the <WSD>bushwhackers</WSD> rode into Aubrey, shot every man in town, stole everything, burned down houses....” 
Meaning of the word marked with <WSD> tags:  A guerrilla (of either side) during the American Civil War.