Like in Master and Commander when they swapped out the American ship for a french ship as american audiances dont like seeing american ships as the bad guys.
The real Master and Commander story, https://www.amazon.com/Journal-Cruise-CLASSICS-NAVAL-LITERAT..., is from the American perspective and is way better than the fictional one. To do it justice it would have to be done as a mini-series because it would be too long for a movie.