I don't think I've ever seen a cataphract reenactor until now

[A Very Super Market]

Das Boot is not as realistic as you think. The writer of the book denounced the movie as a bunch of lies. Although unwarranted, this is the truth. You see the experienced crew whimpering meekly under depth charge attack, enough rivets popping to implode the sub 8 times over, and the reporter being subjected to court-martial material actions.

Neither was "The Thin Red Line". I think we can assume that all movies hold some degree of ahistoricality, and let it be. Das Boot is enjoyable regardless of these rather minor faults, and I'm sure there are people who enjoyed Braveheart for reasons other than accuracy. Only the ones who take entertainment for reality are the fools.