Nick,

Oh yes, you wanted guitar chords as well as the lyrics. Here they are in the key of G, although it starts with a D chord.

(D)Come on all of you big strong men,
(G)Uncle Sam needs your help again.
(G)He's got himself in a terrible jam,
(G)Way down yonder in Vietnam,
So (E)put down your books and (A)pick up a gun,
We're (D)gonna have a whole lot of (G)fun.

And its (A7) one, two, (D) three what are we (G)fighting for?
Don't ask me, I (D)don't give a damn.
Next step is (G) Viet Nam.
And it's (A7)five, six, (D( seven, open up the (G)pearly gates,
There (E) ain't no time to (A)wonder why,
Whoop (D)ie we're all gonna (G)die.

This was a favorite of the troops in Viet Nam.

Roger in Baltimore