Topic: The trouble with the movies
I used to think of movies as a useful resource, I used to think that the production crew would have made every effort to be as historically accurate as possible, but I have become very wary.
I find there are two ways in which one is affected. Firstly you see clothing, tools and other articles in a 'period' film which you assume are reliable along with background and landscape. Then when writing you use these conceptions in you visualization. One knows about guns that shoot far too many times without reloading and are accurate at unseemly distances but do you know when the first repeating pistol actually came into mass production and common usage? Westerns a re dreadful for making the 1880's stand in for anything from 1810 onward. But even the landscape can be very wrong for instance historical accounts of areas of Arizona that are now semi-desert had 'grass as high as a horse'. Overgrazing and the white influx changed the landscape fundamentally from the early 1800's.
Secondly actual events are frequently 'engineered' for the purposes of the film and again they become a part of what one takes as ones own 'historical' knowledge base from which the first seeds of imagination grow.
Check and double check is now my motto.