Saw Gerrera was a loyal follower of King Ramsis Dendup, the benevolent monarch of Onderon who attempted to keep his world apart from the tensions of the Clone Wars. Saw believed firmly in independence, and did not want to see his planet thrust into galactic warfare. But Dendup was ousted by King Sanjay Rash, who committed the world to the Separatist cause. Saw was one of the fervent young loyalists who refused to acknowledge Rash's rule, and openly rebelled against the crown. He and his sister Steela were cast out of the walled city of Iziz and forced to live in ruins amid the jungles of Onderon, but formed a rebellion.
The son of Separatist Senator Mina Bonteri, Lux was young, idealistic, and skeptical of the aims of the Republic and the Jedi Knights. His father was a fervent supporter of the Separatists, and was killed by clone troopers on Aargonar. Lux did not know what to make of Ahsoka Tano and her visit to Separatist space. After a failed peace overture begun by Mina extended to the Republic, Lux's mother died under mysterious circumstances attributed to the Republic. Lux filled her position in the Separatist Senate, representing his home planet of Onderon.
During the Clone Wars, the Galactic Republic had little recourse with worlds that willingly sided with the Separatist Alliance -- the rules of engagement enforced by the Senate and the Jedi Order contained the battlefield to contested worlds. But what of planets where the Separatist banner did not garner unanimous support among its populace? When an insurgency on Onderon refused to recognize the legitimacy of its monarch and began a rebellion to oust both the king and the Separatist influence on the planet, Anakin Skywalker saw an opportunity: If the Jedi could train and equip the rebels on Onderon, these freedom-fighters would keep the Separatists occupied during the Clone Wars.
In its earliest ages of civilization, Onderon was a world marked with savage jungles that were filled with dangerous creatures. To survive, the primitive human inhabitants of the planet protected themselves behind the walls of fortified settlements. Over time, these grew to become enormous walled cities, like the planet's capital, Iziz. In the modern era, during the time of the Clone Wars, the planet's monarch King Sanjay Rash allied Onderon to the Confederacy of Independent Systems. Many Onderonians, however, refused to recognize the legitimacy of Sanjay's rule -- they preferred the neutral stance championed by former monarch Ramsis Dendup, whom Rash ousted.
Ahsoka Tano, a Togruta female, was the Padawan learner to Anakin Skywalker and a hero of the Clone Wars. Alongside Anakin, she grew from headstrong student into a mature leader. But her destiny laid along a different path than the Jedi.
In the final days of the Republic, the galactic government had grown so huge and corrupt that any attempt at change required radical thinking and extreme actions. Outlying systems that saw no benefit from being part of the Republic despite paying heavy taxes, began to rebel. This undercurrent of disgust towards Coruscant was seized by a charismatic leader, Count Dooku. The former Jedi rallied together these worlds in a Separatist movement that saw the departure of thousands of systems from the Republic. When Dooku's alliance was secretly backed by corporate titans that offered their unlimited droid armies to the cause, the Separatists emerged as a major threat to the Republic, and the galaxy tipped towards full scale war.