Made-for-TV Mock Prison Movie

Looking for a made-for-TV war drama I saw as a child shot around the late sixties or early seventies set in the present. The plot was about a small team of US special operations soldiers training for some kind of covert mission (possibly in a hotspot like Vietnam or Middle East). The film focused on a mock prison training exercise where they were subject to confinement under guard and coercive interrogation. One of the soldiers had a Minox subminiature camera that he had to forfeit. I’ll never forget one of the acting guards picking this soldier, telling him to act like a dog referring to him as “Rover” and forcing him to bark, as the trainee soldier eventually complies after breaking down. I remember the scene was quite tense. I’d like to see this film again.