Forum:KB:When Did We Learn Obi-Wan vs Anakin outcome?

When I was a kid, between the time of seeing the original trilogy (mid 80's) and seeing the prequels, I remember hearing or seeing in a comic the story of the "Duel on Mustafar"

I remember vaguely even a comic drawing of Vader in lava, and knew that Obi-Wan "fought"/killed Anakin/Vader...

Was this in a comic book, book book? It was well known I thought that the end of the prequels would END with the fight between these two... Correct?