What song recorded by country joe and the fish became the de-facto anthem for americans opposed to the military presence in vietnam?

Fixin to die like a dog  war composed by Country Joe and the Fish. IT was written by Joe McDonald and was released in October 1, 1965. Just after its release, it became one of the most important protest songs against Vietnam War. Critics consider it as a classic of the counterculture era as this song  was famous among the hippies. This song was preceded by the track Fish Cheer.

whats the question? im not quite understanding your question.