"Marching Song" is actually a short instrumental track comprised almost solely of kazoo and fart noises. Early versions of tracks 6, 15, and 19 were released on their 1994 release, Gob.
"Marching Song" is essentially a brief instrumental piece dominated by kazoo and flatulence sounds. Earlier iterations of tracks 6, 15, and 19 appeared on their 1994 album, Gob.