This film is a piece of crap even by 1967 standards. It really came straight from the dung heap. The script and directing are ridiculous.
The evidence that this was going to be a bad film came in the very first few seconds when the film opens with two men escaping from a POW camp. Instead of wearing their military uniforms, as they did in German POW camps, they were both wearing the blue-and-white striped "pajamas" that Jews were required to wear in concentration and extermination camps. In the very next scene, the American hero is shown wearing normal civilian clothing that fit him just fine, with no explanation as to how he came into possession of them.
Along with the females all having 1960s hairdos, and the commandant of the POW camp also being the ranking occupation authority of the city, it just got worse from there.