"Long ago in a galaxy far, far away. there exists a state of cosmic civil war. A brave alliance of underground freedom fighters has challenged the tyranny and oppression of the awesome Galactic Empire. This is their story! " ―Introduction to many issues of Marvel's Star Wars [src]
The Marvel Star Wars series of comic books was the first ever comic series created for the saga. It spanned 107 issues, with three special Annual issues. The series was relatively long-running, lasting from 1977 to 1986. It was published by Marvel Comics. The series was such a smash hit for Marvel in an otherwise dismal sales year that many who worked at Marvel in 1977 consider it to have singlehandedly saved them from financial ruin. 
Issues 1–6 adapted the events of A New Hope and Issues 39–44 adapted The Empire Strikes Back ; however, the Return of the Jedi adaptation was published as a separate four-issue mini-series outside of the regular series.
Echo Station: "What kind of approval process did you need to adhere to?"
Archie Goodwin. "In the beginning I would send a synopsis of the story line I was planning to do to Lucasfilm and the folks in their licensing department would check over what I was doing. (I dealt with) a lady named Carol Titleman - practically a one person licensing department for Lucasfilm. Later on, as they hired more people, there would be an editor that I worked with and submitted material to.
We have what we call Canon, which is the screenplays, novelizations, and other core works that are directly tied into the continuity, and then there are a lot of marginal things, like the old Marvel Comics series, that we don't really try to work into the continuity when we're planning new projects.
According to Leland Chee. however, all of the Marvel Comics are considered S-Canon unless referenced by a C-Canon source, in which case that particular comic becomes C-Canon.