What are the motifs in Sharpe's Tiger by Bernard Cornwell?

A reoccurring idea in this novel is that war is done for nothing more than increasing trade. The British East India Company does not want to rule India but exploit the country. Sharpe understands this concept immediately. He has not been exposed to what might be termed brainwashing about duty, honor and glory. He had been born in Britain, and that is his only tie to the country until he develops his loyalty later in the story.