Describe symbolism in Sharpe's Company: Richard Sharpe and the Siege of Badajoz, January to April 1812 by Bernard Cornwell

One main symbol in the novel, Sharpe's Company: Richard Sharpe and the Siege of Badajoz, January to April 1812, is the character of Daniel Hagman, who serves as a symbol of the many faceless men serving in the British army..... the men we never hear about.