Okay, this might be a long shot. I'm looking for a cartoon, could be 80's. I was very little when I saw this, so I have very little details. But as far as I remember it was a mix of cartoon, and real-life models. I.e. when seeing the crew inside vehicles (vehicles being some kind of tanks, I think), it was cartoon. But when you saw the vehicles drive around in jungle landscape, it was small models. Maybe stop-motion.
Is my memory totally wrong, or does this ring a bell to anyone?