Conversation so far:
Who played Yoda
Frank Oz provided Yoda's voice in each film and used his skills as a puppeteer in the original trilogy and Star Wars: Episode I – The Phantom Menace.
Why was Yoda important in Star Wars Episode III: Revenge of the Sith?
In Revenge of the Sith, Yoda leads the Jedi Council in pursuing the mysterious Sith Lord Darth Sidious.
Was Yoda succesful in pursuing the mysterious Sith Lord Darth Sidious?
He goes into exile on Dagobah so that he may hide from the Empire and wait for another opportunity to destroy the Sith.
What else did Yoda do in Star Wars Episode III: Revenge of the Sith besides pursuing the mysterious Sith Lord Darh Sidious?
Yoda and The Jedi Council order Anakin to spy on Palpatine, whom Anakin considers a friend and mentor.
why the Jedi Council led by Yoda spy on Palpatine
Palpatine has by now amassed near-dictatorial emergency powers, and begins interfering in Jedi affairs by appointing Anakin as his personal representative on the Council.
Did anything happen to Yoda during Star Wars Episode III: Revenge of the Sith?
Yoda battles Palpatine in a lightsaber duel
who won the lightsaber duel between Yoda and Palpatine in Star Wars Episode III: Revenge of the Sith?
In the end, neither is able to overcome the other and Yoda is forced to retreat

Question: did they ever battle again
Self-contained rewrite: did Yoda and Palpatine ever battle again after the lightsaber duel in Star Wars Episode III: Revenge of the Sith?