Lee Marvin WAY TOO OLD !!!
Lee Marvin looks so old in this film, I was constantly worried he was going to have a heart attack (which he actually did about a year later--and died). The idea that someone that old would be part of an elite military commando unit is absolutely ABSURD and LAUGHABLE !!
In fact, this entire film is laughable. It has all the production qualities of an episode of "Walker, Texas Ranger". Which is appropriate, since it also stars karate man Chuck Norris.
Too bad Sylvester Stallone was not around for credibility.