The title is given as BRING THEM HOME (IF YOU LOVE YOUR UNCLE SAM) on the album "Seeds: The Songs of Pete Seeger, Vol. 3," Appleseed CD #1072, 2003, where it is sung by Pete Seeger, Billy Bragg, and Ani DiFranco.

Allmusic.com has a sound sample, and I would also expect to find sound samples at Amazon.com, Barnes & Noble, and Yahoo! Shopping > Music, to name a few. (Their samples might or might not be the same.)

Maybe somebody who is good at that kind of thing can listen to the samples and work out the chords.