Zero to hero did indeed occur during WW2. Aviatiors were dropping like flys. The life expectancy of a figher pilot was less than a week because the Japanese Zero's were more maneuverable and could out climb our
current fighters. There was a paticular occurrence with the
introduction of the
Corsair into the war and a new group of pilots just out of
training were assigned Corsairs and one pilot became an ace his first time out hence the term zero to hero. He Unfortunately did not survive his required sorties.