Onslaught pits the battle-tested heroes of the past -- Luke Skywalker, Han Solo, and Leia Organa Solo -- along with the next generation of Jedi and droids, against fearsome never-before-encountered enemies from beyond the galactic rim ... It is a perilous time for the New Republic. Just when unity is needed most, mistrust is on the rise. Even the Jedi feel the strain, as rogue elements rebel against Luke's leadership. When alien invaders known as the Yunnan Vong strike without warning, the New Republic is thrown on the defensive. Merciless warriors, the Yunnan Vong glory in torture. Their technology is as strange as it is deadly. Most ominous of all, they are impervious to the Force.