Sharpe’s Havoc - Bernard Cornwell

It is the spring of 1809 and a small British army is stationed in Lisbon when the French invasion of northern Portugal begins. Lieutenant Richard Sharpe and his squad of riflemen are sent into the beleaguered city of Oporto to rescue a British mother and daughter, but what seems like a straightforward mission becomes tangled in betrayal when Kate Savage disappears.
Sharpe, with Sergeant Patrick Harper and a score of riflemen, is cut off in the city when the bridge over the river Douro is broken. They try to fight their way back to the British lines, but their orders are overridden by a mysterious English officer, who instructs them to remain in northern Portugal. Colonel Christopher excels in high diplomacy and low cunning, and his activities lead Sharpe and his riflemen into treacherous danger.
Sharpe becomes the hunter instead of the hunted and seizes the chance to rescue the missing Kate Savage and pursue the man who thought to sacrifice Sharpe and his riflemen for his own ambition. Amidst the wreckage of a defeated army, in the storm lashed hills of the Portuguese frontier, Sharpe takes a terrible revenge.
Sharpe’s Havoc is a classic Sharpe story, a return to Portugal with Richard Sharpe in fighting form in the company of Sergeant Patrick Harper, Captain Hogan and
Sharpe’s beloved Greenjackets.