For me, it's always difficult when a historical film claims to depict or represent a reality that none of us can know, that is always different. It's always the case. We never know what happened then.
I've had times where I'm like, "Whoops, maybe I shouldn't have done that. " But, you know, it does grow out fairly quickly, so it's not the end of the world. If you really mess up, you can always go to somebody who knows what they're doing and have them try to fix it.