Not a song I was aware of, but having looked at the lyrics it seems to be more of a post war reflection, and commentary on life for soldiers post War. It was released after the Paris Peace Accords/End of Draft, so the American withdrawal was underway.
We use the CCR track (1969) as part of the Anti War protest movement, and show how this affected and influenced political and public opinion.
"Y mae dafad ddu ym mhob praidd" 1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10