Best, heck no way of picking a "best" to many candidates for number 1.
Worst, well I guess if we eliminate quasi military flicks that are only military thanks to guys with guns, I would say worst might be Pearl Harbour.
It should have either been a romance drama set in a war, or a war movie that had a few scenes outside of the combat zone.
Other candidates for worst might be hmmm having trouble remembering, after all I have tried to forget them.
Thin Red Line. It did to the book exactly what the film Dune did to the book.
I won't be to harsh about films pre 1970, as they often didn't have geniuses like Speilburg to work with, or advanced CGI to get around the fact that most of the gear no longer exists.
Patton is a great film, even if the tanks are just American armour painted the appropriate colour.
My critique is usually limited to films with crummy acting. Anyone critiquing films because the film producer couldn't provide 50 tanks of the correct model is a bit anal.
Today, my dvd library is rapidly expanding (and will continue until Matrix finishes my desired wargames hehe). Just picked up the Why We Fight series done with Frank Capra. The stuff has excellent footage (propaganda dialogue so think it would stop a dump truck though hehe).
Must have films would be easy to list Saving Private Ryan, Longest Day, A Bridge Too Far, Midway, Patton. There are others, but these are "epics" of war movies.
I LIKE that my life bothers them,
Why should I be the only one bothered by it eh.