Who said, "Never fight a land war in Asia?"?

I know this is about Vietnam (I think) but maybe there's another origin to this saying?
Update: This is funny. I totally forgot that this was a quote from Princess Bride. I've been quoting it since I was little, thinking it was a famous military saying or wisdom. But did MacArthur really say this to JFK? There are no sources that vouch that....
13 answers 13