Also released as Sergeant Steiner,
Breakthrough is a German war flick helmed by western specialist Andrew McLaglen. Richard Burton stars as Sgt. Steiner, a German who doesn't subscribe to the Nazi party line. When the plot to kill Hitler is hatched, Steiner is persuaded to join the conspiracy by General Hoffman (Curt Jurgens). Robert Mitchum and Rod Steiger costar as American officers peripherally involved in the storyline. Intended as a sequel to the successful
Cross of Iron,
Breakthrough failed to match the box-office performance of the earlier film. ~ Hal Erickson, All Movie Guide