I was just re-watching it the other night, a really good film, very well acted and a great/sad story.
He told me that the Morant character was somewhat embellished in the movie -- specifically in that "Harry Morant was a pretty bad guy" (just picture this with an Australian accent, LOL). Apparently Morant was what was known as a "remittance man" in Australia . . . this tag was originally applied to a person who joined the British Army and fled the country so as to avoid paying a huge debt, but over the years it was also applied to men who joined the British Army to avoid prosecution for some kind of crime. I believe the latter was the case with Harry Morant.