St Julien is a town near the French/Belgian border which witnessed several battles during WW1.
The composer Arthur W. Hughes (1870-1950) was born in Kingston, Ontario, and left home when he was quite young to perform with circus bands in US. He wrote several marches and a few other compositions but this one, dating from 1918, is the most well-known. The march also works as a fast circus march. Here it has been expertly arranged for brass band by Dr. Keith M. Wilkinson.