The Yuuzhan Vong are a fictional alien species from the Star Wars expanded universe, first introduced in the novel "Vector Prime." They are known for their unique biology, which is entirely organic, and their rejection of technology. Instead of machines, they use living creatures and bioengineered organisms for their ships and weapons. The Yuuzhan Vong are characterized by their warrior culture and religious beliefs centered around their gods. They invade the Star Wars galaxy, posing a significant threat to the New Republic and its allies. Their conflict with the galaxy's inhabitants is a central theme in the New Jedi Order series.