sentences:  Commodore is an official flag rank when used during wartime and is equivalent to today's one-star admiral – rear admiral (lower half).Many rank systems only use this rank during wartime.The first Hispanic alumnus, born outside of the United States mainland, to graduate from the academy and to reach the rank of admiral was Rear Admiral Frederick Lois Riefkohl, a Puerto Rican who graduated in the class of 1911.