Another flick with all the big names is The Eagle has Landed with Duvall, Michael Caine, Donald Sutherland,Donald Pleasence,Treat Williams,Anthony Quayle.About a German elite force Fallschirmjagger attempting to kidnap Winstn Churchill
Also I loved "the smell of napalm in the morning"
He was in a few episodes of the Combat series also saw him in the Twilight Zone series
Duvall appeared again with Treat Williams a few years later in "The Pursuit of DB Cooper" not accurate but action comedy
Evidently Duvall is a direct descendant of Confederate General Robert E. Lee
RIP Sir to a dying breed
PS forgot about True Grit with Wayne