
With the Jedi branded traitors and the Clone Wars at an end, Sidious declared himself Emperor and restored the Sith Empire when he transformed the Republic into the Galactic Empire. The order was a resounding success: nearly all the Jedi in the field were killed. While Vader carried out the assault on the Temple, Sidious initiated Order 66, with the latter causing the Clones' biochips to brainwash them into betraying and slaughtering the Jedi, ultimately leading to the Jedi Order being defeated and nearly destroyed. Sidious then killed Windu, and Skywalker became the Sith Lord Darth Vader and led the Siege of the Jedi Temple, killing everyone inside it. Skywalker, who sought power from Sidious in order to save his wife, Padmé Amidala, from death, intervened and incapacitated Windu before the Jedi Master could kill the Dark Lord. In what Sidious would publicly label the "Jedi rebellion," Windu and three other Masters confronted the Chancellor, who killed the three Masters and engaged Windu in a lightsaber duel. Anakin Skywalker, a Jedi Knight believed to be the Chosen One destined to destroy the Sith, discovered that Palpatine was Darth Sidious and informed Jedi Master Mace Windu. The Jedi Purge began at the end of the Clone Wars. In addition, the clone army that provided the Republic with its military force had secretly been implanted with bio-chips by its Sith creators that, upon activation, would trigger total compliance and force the clones into killing their Jedi leaders.

He used the war to manipulate and deceive the Senate into giving his office virtually unchecked executive power in the name of security. A millennium after the defeat of the Sith, Darth Sidious, using his public persona of Senator and then Supreme Chancellor Palpatine, manipulated and deceived the galaxy into the Clone Wars as a pretext for gaining emergency executive power over the Galactic Republic. The Sith operated in secret, plotting their eventual destruction of the Jedi Order. The destruction of the Jedi traced its origins to the ancient wars against the Sith, at the end of which the Sith were nearly eliminated by the Jedi. The Great Jedi Purge ( 19 BBY- 3 BBY), also known as the war against the Jedi, was the period in which the Jedi Order was destroyed by the Sith and the Jedi were hunted by the Galactic Empire to near extinction. Now the Jedi are all but extinct." ―Obi-Wan Kenobi, to Luke Skywalker " A young Jedi named Darth Vader, who was a pupil of mine until he turned to evil, helped the Empire hunt down and destroy the Jedi Knights.
