After the death of Sifo-Dyas, Dooku successfully erased Kamino, Dromund,[1] Dagobah, and thirty-five other star systems from the Jedi Archives, despite no longer being a Jedi himself. Why Dagobah and the other systems?
To ensure that it stayed a secret, Dooku erased all records of the planet Kamino from the Jedi Archives, along with thirty-seven additional systems, including Dagobah and Dromund, that Sidious had judged to be of potential value to the Sith—this all being done after having publicly renounced and left the Jedi Order.
Once a Jedi -- trained by Yoda -- he became disillusioned with the Jedi Order and thirsted for greater power. Dooku voluntarily left the light side behind and became Darth Sidious' dark side disciple, taking the secret name Darth Tyranus and leading the Separatist army.
Sifo-Dyas, a Jedi Master, ordered the creation of the Clone Troopers before the Jedi Council authorized it, and his story is explored in The Clone Wars. Sifo-Dyas' actions and his ties to Count Dooku had significant consequences, as his clone army ultimately served Palpatine's purposes and led to the Jedi's downfall.
Why Dooku DELETED Dagobah from the Jedi Archives - Star Wars Explained
Did any of the clones disobey Order 66?
Some clones disobeyed the infamous order than decimated the Jedi order, and refused to execute it. SOME of these Clones include; Captain Rex: Captain Rex, as most know removed his chip that would later be the way that Palpatine would execute order 66. Wolffe: As with Captain Rex Wolffe removed his bio chip.
Sifo-Dyas never worked for the Sith or had anything to do with the Order 66 programming – it was only after his death that Darth Tyranus reached out to the Kaminoans and became the true leader responsible for the clones' secret chip.
Dooku belonged to the aristocracy, and his weapon reflected an older, more chivalric style than the Jedi he faced. It also reflected his status as the head of the Separatists: the lightsaber looked far more ceremonial than practical, suggesting that he himself did not face combat nearly as much as the Jedi did.
Indeed he did. Dooku (aka Darth Tyrannus) knew his master's identity. At this point the Jedi thought Dooku was the Sith Master. The kidnapping was planned to reinforce public support for Palpatine while further confusing the Jedi about his true identity.
Concerned that Sifo-Dyas' abilities made him a threat, Darth Sidious ordered his new apprentice to have Sifo-Dyas killed. And so it was that, in the end, Sifo-Dyas was targeted by a crime cartel who had been paid by none other than his childhood friend - Count Dooku himself.
Unfortunately, the Dark Side soon took hold of him. He murdered Yaddle and pledged himself to Darth Sidious. However, Yaddle wasn't the only Jedi that Dooku killed. Yoda #4 (by Jody Houser, Luke Ross, Nolan Woodard, and VC's Joe Caragagna) showed how Dooku brutally killed his biggest fan.
Although Palpatine told Dooku the plan was for Obi-Wan's death to be used as leverage to turn Anakin, this was not the case at all. Sidious wanted Anakin to kill Dooku. The killing of a powerful Sith such as Dooku was the tipping point to set Anakin on track to the dark side.
Dooku: Jedi Lost is a canon audiobook written by Cavan Scott and narrated by a full cast. It follows Asajj Ventress as she delves deep into the past of Count Dooku and discovers why he chose to leave the Jedi Order.
So, it's easy to believe that Dooku really meant what he said and hoped that he and Obi-Wan could wipe out all the corruption, including Sidious. Regardless, the Jedi's hubris proved to be their downfall. Dooku revealed a massive part of the Sith plan to them, but they couldn't bear to question their judgment.
Sidious himself felt that he and his peers had outgrown the use of lightsabers, and only continued carrying them to mock the Jedi. He ultimately viewed his own lightsabers as little more than an affectation, and rarely wielded them in combat.
He believed that the Sith, who had used lightsabers for tradition since the time of Darth Bane, should have moved on from using lightsabers (which, though invented by a Sith, had become the symbol of the Jedi) and instead rely entirely on scheming and the Dark Side of the Force to earn and maintain their power.
He believed that the Jedi's lightsabers, created as the order's primary weapon, clouded their vision and blinded them to the fact that everything around them is a weapon through the Force, and that the Jedi put too much stock in lightsabers.
Fives was one of the first to learn about the inhibitor chips and removed his well before Order 66 was issued. In one of his cruelest moments, Supreme Chancellor Palpatine revealed his Sith identity to Fives, knowing nobody would believe him.
Later in his life, Sifo-Dyas became a Jedi Master. In 39 BBY, he also became leading member of the Jedi High Council, the governing body of the Order, in the last decades of the Galactic Republic. However, some time prior to the Invasion of Naboo, tensions arose between Sifo-Dyas and his fellow councilors.
While Yoda sensed that the Sith's plan involved the Clones, it was too late to prevent Order 66. Instead, he placed his faith in the Force and allowed the dark events to happen.
