A good example for Bert's definition is an American song long buried in Carl Sandburg's American Songbag: The Sloop John B.
About 1960 it was sung by a trio (Kingston Singers? Peter, Paul and Mary?) and landed a direct hit in the German Federal Armed Forces.
I want to go home - that was a moving chorus for all the draftees in their barracks, far from home and their loved ones. The words were simple (simplicity is a high art), and the beautiful tune touched the hearts.

The song coincided with the delivery of the new assault rifle G3, standard weapon for more than 40 years. So it started:
What is the use of the G3?
We only get misses.
We are fed up (lit.: our snout is filled up)
And we want to go home ...

Other stanzas were added about the bazooka and the segeant major. You could hear it nearly every evening in the Naafi, and when I got my medical discharge in 1985 it was still sung.

What will happen to this song I don't know, because a new rifle G36 was issued; but when we old draftees meet in a reserves reunion and are filled up to the brim we still sing it again.

Oh them glorious days!