Originally Posted by Corinthian
Allegedly. It's never been clarified why Yoda went into hiding on Dagobah. The Thrawn Trilogy (Or is it the Duology? I forget.) suggests that the Dark Side Nexus was created while Yoda was hiding there, when a Bpfaashi Dark Jedi attacked Yoda and Jorj Car'das. Yoda, naturally, obliterated him.
Hmm, from what I had read - I thought that had happened prior to the Clone Wars, so Yoda went to Dagobah, specifically because it had that Dark Side nexus - but that was probably from Wookiepedia, that I read that, so dunno how accurate it was.