This song is another one I discovered from Dad's music collection:
It's "99 Red Balloons" by Nena, a German band. It was released in the early 1980s and is a protest song against war and nuclear weapons. "99 Red Balloons" is the English version of the band's "99 Luftballons"; however, it is not a direct translation and the band expressed frustration at the two versions not being properly in sync with one another. Regardless, "99 Red Balloons" is still a worthy anti-war song - it conveys its message well.
"99 Luftballons" can be found here: