 At the tenth measure, (|F|E7|), which restates the main theme, Sousa uses a "deceptive" chord change.Instead of using F to G7 to C (as in measures two and three), the chord goes from the IV (F) "to" V7/VI (i.e., E7), "to" the VI (Am).The main melodic theme uses the same notes, but revolves around a different harmonic progression.