Go Tell the Spartans (1978)

Plot: In 1964 Vietnam, a US military advisory group struggles to deal with the VC and their limited resources.
Stars: Burt Lancaster
Best Quote: If your History teacher says "We're going to watch a really good movie on the beginning of the Vietnam War", DON'T BELIEVE HIM! - IMDB Reviewer 

The Movie
This movie has received high praise - which puzzles me. Shot in 31 days in SoCal with a nobody supporting cast and hokey soundtrack - its slow-moving and predictable. The direction and action scenes are at TV-movie levels. And Lancaster is far too old for the role. No amount of "Hollywood Magic" can turn 65 y/o Burt into a 45 y/o Army combat officer.  Hilariously, the 58 y/o "commanding General"  looks younger than Major Lancaster.

Summary: The movie hasn't aged well. Go Tell the Spartans did it first, but Platoon and We were Soldiers  do it much better.

Lancaster Involvement
According to his Bio, Lancaster was so smitten with the script/role that he not only took a small salary, he chipped in $150,000 to keep the cameras rolling.  He later remarked it was "the best role I've been offered in years" and "for once, I don't have to change a word of the script" .  During production, Lancaster injured his knee playing golf,  so to explain the limp, his on-screen character was shot in the leg.