Star Wars IV, V and VI ( I, II and III)

 Did you know that George Lucas made episodes IV, V and VI before episodes I, II and III?   The original three films were not numbered until I, II and III were made.  Yes, I II and III were made after the first three films - confusing?   Episodes IV, V and VI films are a lot different then  the film is in episodes I, II and III.  You see lots of space battle combat in I II and III as well as ground and background combat.  The films from episodes IV, V and VI were filmed from WWII footage.