When someone is told that he is an ace, he is expressing that the something is very outstanding (activity, profession, ability …).
It is a phrase that he bequeathed to Spain from French aviators during the First World War.
That was how they referred to his most prominent men , and in particular the pilot who had shot down at least five enemy planes. The best of all was known as "ace of aces." And it is that in French the word ace also designates the number one.
The first French aviator to be credited as such was Adolphe Pégoud, whose brilliant military career in World War I was closely followed by the French press.
