Essentials !
I listen to a lot of the old time radio programs .Now there playing one "Escape", about just after WWII.
"Just what can you do ? " I can fly a Spitfire quite well and Im very knowedgeble about French Brandy."
That's all you need !

Sounds interesting, do you remember the name of that particular episode?
https://archive.org/details/Escape19491950Mark