Matt McGinn's BALLAD OF JOHN MACLEAN celebrates the Communist organizer's return to Glasgow on December 3, 1918 after having been jailed.

Many recordings of "Ballad of John MacLean" on YouTube     https://www.youtube.com/results?search_query=+%22Ballad+of+John+MacLean%22+
MUDCAT: Digitrad    /mudcat.org/@displaysong.cfm?SongID=446
There is also Hamish Henderson's JOHN MACLEAN MARCH
Many recordings of " John MacLean March "on YouTube https://www.youtube.com/results?search_query=Maclean%27s+March
The John MacLean March Lyrics & Info from unionsong.com    http://unionsong.com/u124.html

Thanks to Levana Taylor for suggesting the above two songs.