On Mandalore, Duchess Satine's nephew has information exposing internal corruption within the government. Though this only hardens her suspicions, Satine cautions her nephew and his fellow cadets to keep to their studies and not pursue their investigation, as the dangers might prove more than they can handle.
FALL OF THE REPUBLIC
Not wanting to be mired in galactic conflict, the Duchess declared her planet neutral. This isolation brought hardship to Mandalore, and gave the Death Watch -- a violent faction of Mandalorians -- opportunity to ally with the Separatists and target the Duchess for assassination. Satine survived several plots hatched by her enemies, but the Death Watch leader Pre Vizsla overthrew her regime with the help of Darth Maul. Satine was thrown in prison, but rescued by her old love Obi-Wan Kenobi and her sister Bo-Katan. Her escape was short-lived, however: Maul’s forces recaptured Satine and Obi-Wan, and Maul killed the duchess as Obi-Wan watched in horror.
A Senator from Duchess Satine's home planet of Kalevala, Tal Merrik is not the man he first appears to be. Conniving and greedy, Senator Merrik will happily betray his closest "friend" if it helps him achieve his shady political goals. Merrik is secretly sympathetic to the Death Watch, and betrays Duchess Satine when she is most vulnerable -- en route from Mandalore to Coruscant aboard her starship Coronet. The slippery Merrik tries to outwit the Duchess and her protector, Obi-Wan Kenobi, but ends up running afoul of Anakin Skywalker's lightsaber.
During the Clone Wars, Pre Vizsla served as governor of Concordia, a moon of Mandalore, and appeared to be a close ally of Duchess Satine Kryze. But Vizsla had another, secret life: he was the leader of Death Watch, a hidden group of Mandalorian commandos seeking control of their planet. In truth, Vizsla despised Satine’s pacifist beliefs and longed to restore Mandalore’s warrior heritage. To accomplish this goal, he formed several alliances with nefarious parties that ultimately led to his end.
The warrior clans of Mandalore were believed to have been wiped out ages ago, their tattered remnants exiled to the Concordia moon. But as the Clone Wars swept the galaxy, the treacherous governor Pre Vizsla resurrected the Mandalorians, and with them, their legendary combat armor that was feared across the galaxy. Backed by Count Dooku and the Separatists, Vizsla began building an army to retake Mandalore from the control of pacifists who were trying to bury violent Mandalore's past. As the coup became inopportune, Dooku abandoned the Death Watch. The warriors wandered the galaxy for a time, then helped conquer Mandalore as part of Darth Maul’s Shadow Collective. Maul then became Death Watch’s leader when he killed Pre Vizsla