Darth Caedus, born Jacen Solo, was a human male Sith Lord who turned against his family and friends, betraying his former principles and leading the Galactic Alliance he once championed into a reign of terror as he attempted to bring order and stability to a fractured galaxy. The son of Han

Han Solo (Human) Character Major Characters

and Leia Organa Solo

Leia Organa Solo (Human) Character Major Characters

, Caedus was once a leading Jedi Knight

Jedi Order Organization Galaxy-Wide Organizations

who proved crucial in defeating the Yuuzhan Vong

Yuuzhan Vong Sentient Species

and protecting the galaxy during the Yuuzhan Vong War. It was Solo's desire to protect the galaxy and his increasing willingness to accept any cost in that cause that facilitated his fall to the Sith, a trait that had similarly corrupted his grandfather, the Chosen One Anakin Skywalker

Darth Vader (Human) Character Major Characters

.

Born in 9 ABY, Jacen Solo spent most of his early years as the target of various kidnapping plots and schemes against his famous parents. When he was thirteen, he and his twin sister Jaina

Jaina Solo (Human) Character Major Characters

began attending the Jedi Praxeum on Yavin 4

Yavin IV Planet

, where their uncle Luke Skywalker

Luke Skywalker (Human) Character Major Characters

taught them the ways of the Force. There he made several friends, among them the Hapan

Hapes Consortium Organization Planetary and Sector

princess Tenel Ka Djo, to whom he became strongly attracted. While training, he and his friends defeated numerous plots against the New Republic and, in 24 ABY, he and his younger brother Anakin were apprenticed to Skywalker.
A philosopher who struggled with the idea of employing violence to fight violence, Solo entered a personal crisis with the outbreak of the Yuuzhan Vong War. He preferred to serve off the front lines, but felt obligated to volunteer for the strike team assembled to eliminate the voxyn queen at Myrkr

Myrkr Planet

. There, Anakin Solo was killed and Jacen Solo stepped up to lead the team, killing the queen and ending the voxyn threat before he was captured by the Yuuzhan Vong.
Solo spent nearly a year in captivity, during which he was tortured for weeks at a time. Solo struggled with his circumstances and with the teachings of his captor and mentor, Vergere. He slipped to the dark side before returning and embracing the idea of responding to the universe with unconditional, all-encompassing love. He escaped Yuuzhan Vong custody with Vergere, a former Jedi of the Old Republic, and rejoined the war effort. In the final battle of the war, Solo stormed Supreme Overlord Shimrra Jamaane's Citadel and defeated Onimi, who was mentally controlling the Supreme Overlord, while Solo himself experienced a moment of unity with the Force.