Sentence:  Ross's fortunes differed sharply from those of the principal Choctaw chief, Greenwood LeFlore, who, unlike Ross, signed a removal treaty on behalf of his people, only to <WSD>stay behind</WSD> himself, accept US citizenship, and go on to a distinguished career in Mississippi politics. 
Meaning of the word marked with <WSD> tags:  To remain where one is, whilst others leave.