Othello | Research Starter"Iago, an ensign serving under Othello, Moorish commander of the armed forces of Venice, is passed over in promotion when Othello chooses Cassio to be his chief of staff. In revenge, Iago and his follower, Roderigo, arouse from his sleep Brabantio, senator of Venice, to tell him that his daughter, Desdemona, has stolen away and married Othello. Brabantio, incensed that his daughter would marry a Moor, leads his servants to Othello’s quarters ..."