The caissons are coming

Over hill, over dale
As we hit the dusty trail,
And the Caissons go rolling along.
In and out, hear them shout,
Counter march and right about,
And the Caissons go rolling along.

Edmund Louis Gruber(1879-1941) wrote these words while waiting for artillery ammunition.
He was out of ammunition, but heard his provision coming and encouraged himself with this song. It was early in his military career at the age of 29 when he wrote these words as a first lieutenet. He would later receive three promotions, all the way up to colonel; and served as a temporary brigadier general before his death. He also was related to Franz Gruber(1787-1863), who wrote Silent Night on December 24, 1818. "The Caissons go rolling along" became the official field artillery song and then the official song for the entire army.