I need to know the title of an old movie that puts an aging war hero in charge of a military academy.

Thank you

Hard Knox?

Hard Knox (1984) (TV) (http://imdb.com/title/tt0087383/)

Major Payne? One of the wayans brothers plays a discharged marine that finds a job as a teacher in a JROTC program. He yells a lot and seems to be a very angry man in the movie.
Hope this helps.

Major Payne. He calls all the kids turds?

Major Payne (1995) (http://www.imdb.com/title/tt0110443/)

Lol... funny movie... its in my collection... :)