It is B-series science fiction.

Quite possible the most memorable and most-dishonest movie poster of the 80's, Def-Con 4 (which was actually NORAD's code for peacetime conditions) is way better than it has any right to be and makes me wish that Trakt had rating designations like "fun". Italy ruled the 80's post-nuke exploitation scene but this one, from Canada, gives them a run for their money. It very much feels like a precursor to the low-budget good times that Astron-6 would make a couple decades later.