After the utterly solemn and serious affair of the wedding, Jack convinces his brother James to leave his wife and come join the Prussian Army with him.
For some reason, the Prussian army decides to go to Spain, where Jack and James (And of course their old mate, Regimental Colour Captain Major General Lord Obadiah Hakeswill of Brandenburg) meet a marvelous fellow called "Richard Sharpe" who is a "Captain" in the 95th "Regiment" of Foot.