Infiltration of the Jedi Temple

Immediately following Order 66, which saw the mass execution of Jedi across the galaxy, surviving Jedi Masters Obi-Wan Kenobi and Yoda conducted an infiltration of the fallen Jedi Temple on Coruscant. The temple had been attacked by Anakin Skywalker, Kenobi's former Padawan who had recently succumbed to the Dark side of the Force and taken the name Darth Vader. Except Yoda, Kenobi was unaware of Skywalker's fall or the cause of Order 66, and planned to return to the temple to investigate, as well as shut down an emergency beacon that had been activated by Vader that recalled Jedi back to the Temple and into a trap.

At the Temple, occupied by clone troopers, Kenobi and Yoda encountered and fought Decoy Squad Five, a clone squad whose members had disguised themselves as Jedi to lure any stragglers into a trap. They fought more clones at a surface entrance and continued to face different types of clone troopers on their way up to the security station. On their way they discovered the corpses of their Jedi brethren and noticed that several had been killed by lightsaber strikes, but had little time to mourn as they hid from the thousands of clone troopers at the Temple.

After reaching the security station Kenobi fought a group of clone assassins posted there by Vader and deactivated the beacon, after which the younger Jedi examined the security holograms to discover who had invaded the Temple. To his horror, Kenobi discovered Skywalker's betrayal with a hologram of him personally leading the attack on the temple. With their knowledge, Kenobi and Yoda set out to destroy the Sith perpetrators of the Jedi massacre, with Yoda fighting Dark Lord of the Sith Darth Sidious in the Senate Building on Coruscant, while Kenobi confronted his former apprentice on the planet Mustafar.

Text and facts from the “Infiltration of the Jedi Temple/Legends” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.