Alcohol

"Hitler wanted to invade the French, and he didn't really know if Great Britain was comfortable with him invading the French, because they might think he wouldn't invade the French because they thought he thought they weren't comfortable with him invading the French, meaning that he shouldn't invade the French, however they might also know that he is comfortable invading the French and he thinks that they won't defend the French as they aren't comfortable with him invading the French. Thus letting Great Britain waste their resources on the French without actually having him invade the French. And that's why the- this Reich is the greatest of all time."

https://www.youtube.com/watch?v=1zkWaPNF7P4