I saw Country Joe at a concert once that was being taped for broadcast. He started the "Bleep" cheer - give me a B, give me an L, give me an E...etc. When the final letter was shouted out, he asked "What's that spell" and the audience roared "FUCK".   He franctically started shaking his hands and tried it again "What's that spell" and the crowd again roared "FUCK".   I don't think the station every broadcast it.

Country Joe was discharged from the Navy in 1960. I don't believe he was ever in Vietnam, but he has done an incredible job of fighting for Vietnam Veterans since the war.   Country Joe helped bring to light issues that would have been neglected by many of the counter-culture.