An Infamous Army is a novel by Georgette Heyer. In this novel Heyer combines her penchant for meticulously researched historical novels with her more popular period romances. So in addition to being a Regency romance, it is one of the most historically accurate and vividly narrated descriptions of the Battle of Waterloo. An Infamous Army completes the sequence begun with These Old Shades, and is also a sequel to Regency Buck.