Other than part of the population being enslaved by the Empire, not much really. Chewbacca is just the only main wookie in the series. Doesn't mean there aren't any more, just that they aren't relevant to the story being told. read more
Ten years ago to this day, author R. A. Salvatore killed Chewbacca. More specifically, his book Vector Prime was published, a Star Wars novel in which Chewbacca is consigned to an ignominious death on a planet succumbing to a killer poison bug swarm. read more