Yoda

Geonosis & Fight with Dooku
At Geonosis Yoda led a contingent of Clone Troopers to help evacuate the Jedi. They had the hopes of capturing Dooku to prevent a war. Yoda went to confront his former apprentice Dooku, but was stopped short of capturing him when Dooku used to Force to drop a heavy pillar to nearly crush Anakin and Obi-Wan. Yoda chose to save his fellow Jedi."'Begun the Clone War has' - Yoda"Yoda is also the one who coined the descirptor of the conflict the "Clone Wars"

Kashyyyk & Order 66
Yoda was helping the Wookie defensive on Kashyyyk when Order 66 was initiated. With the help of his Wookie friends – which included Chewbacca – Yoda was able to escape safely.

Return to Coruscant & Fight with Sidious
After exploring the ruined Jedi Temple with Obi-Wan, Yoda confronted Sidious directly in the Senate buildings where he was near victorious, but ultimately failed to bring an end to the tyrant Sith Lord. He escaped with the help of Senator Bail Organa.

Exile to Dagobah
After Order 66, it was clear Palpatine had solidified its rule as Emperor. Yoda and Obi-Wan agreed to go into hiding and wait for Luke and Leia to grow up with the hopes of training them to be the new Jedi. Yoda chose Dagobah as his destination as it was a planet strong in the Dark Side of the Force which would mask his Light Side presence.

Training of Luke Skywalker
Upon meeting Luke he first pretends to be a swamp dweller, but later reveals he is the Jedi Master Yoda. Luke is amazed which prompts Yoda to give many lessons to Luke about how "size matters not" and how powerful the Force. He also warns Luke about the Dark Side and begs him, along with Obi-Wan's Force ghost, not to rush off to Cloud City to fight Vader prematurely.