Zardnaar
Legend
I'm going to bring up West End Games' Star Wars RPG that was first released in 1987 I think. As hard as it is to believe, WEG was pretty much the only source for new Star Wars material after around 1985. Kenner was no longer producing toys, the Droids/Ewoks cartoon wrapped up in 1986, and there was no expectation that we'd ever see a new Star Wars movie ever. When Timothy Zahn wrote the Thrawn books he was given RPG books from West End Games to use as a reference for the setting.
Yup I own those books as well.
Huge amount has been recycled into Disney cannon and old EU.