What Was the Military Hierarchy in Othello?

The military hierarchy in William Shakespeare's "Othello" consists of Othello as the top-ranking officer, or general, Cassio as the second in rank, or lieutenant, and Iago as the third-ranking officer, the ancient. Aside from rank, each of these major characters also has a different heritage. Othello is a Moor, from northern Africa, Cassio is from Florence, a state independent of Italy at the time, and Iago is a Venetian.