World War II was totally unrealistic
...and then, in the entire rest of the show, over five or six different big wars, they never use the superweapon again. Seriously. They have this whole thing about a war in Vietnam that lasts decades and kills tens of thousands of people, and they never wonder if maybe they should consider using the frickin' unstoppable mystical superweapon that they won the last war with. At this point, you're starting to wonder if any of the show's writers have even watched the episodes the other writers made.
As the first comment says, Truth is stranger than fiction.