Lyric discussion by drpoundsign 

Cover art for Long Time Gone lyrics by Crosby, Stills, Nash & Young

I always had assumed the lyrics to be about the Vietnam War ( a Good guess for that band and time period.) But-this makes sense, Too. Didn't know it was this old, either. It predates "Four Dead in Ohio" by several years (as does the 1970 Kent State Massacre, of course.)