How does the author use foreshadowing in Sharpe's Tiger?

In 1799 Richard Sharpe contemplates deserting from the British army in India but not out of cowardice. Private Sharpe only wants to better his life somehow with Mary Bickerstaff who is his love interest. However, Sergeant Obadiah Hakeswill sets up Sharpe for a severe flogging by goading him into a fight witnessed by an officer and an ensign. While receiving his flogging that would have likely killed him, General Harris sends for Sharpe.This foreshadows an offer Sharpe cannot refuse.