"The Great Little Army" is a British military march that was composed by Kenneth J. Alford in 1916.
Alford (real name Frederick Joseph Ricketts) was a bandmaster of the British Army/Royal Marines, who in the last position he was appointed to directed the Band of HM Royal Marines, Plymouth.
It was written to honour British and Allied victories won on the Western Front.
The phrase was actually devised at the British War Office by Sir Frederick Maurice to be attributed to the Kaiser as propaganda.
Colleen McGrann, spokeswoman for the Canadian Army explained that "Celer Paratus Callidus" was "neither particularly tuneful or easily recognizable" and that "The Great Little Army" "seemed appropriate in both name and tune".