Sentence:  During the latter part of the rebellion, he has pretended to be a warm <WSD>supporter</WSD> of the Government, and he may have been sincere; but, from what others have told me, he said to them he was not during the early part of the rebellion. 
Meaning of the word marked with <WSD> tags:  A person who supports, promotes, advocates or champions a cause or movement; an adherent.