https://bookshop.org/p/books/flashman-at-the-charge-george-macdonald-fraser/af0e8f98b48522e2

Can a slave trader, rapist, murderer who fights fixed duels be all bad?

General Sir Harry Flashman is the worst human who ever lived, but he is honest in his diaries. In this this book he dishes the dirt on Lord Cardigan and explains how an ardent coward ended up in the middle of the biggest military disaster any country was ever proud of.