Like the sanctions that were put on Cuba for 50 years and quickly ended the Castro regime?
Those were just US sanctions on Cuba.
Oh dear. Try to read more than the headline.
Here, let me help you:
President Donald Trump signed an executive order on Thursday designed to choke North Korea's economy by penalizing nations that trade with the communist dictatorship.See that word, "nations"? Now, how many nations were included in the sanctions that were put on Cuba for 50 years? Here, I'll give you time...
Times up! Answer: One! The United States!
So...it's an invalid comparison. Sorry.