"Over There" is a 1917 hit song written by George M. Cohan, that was popular with the United States military and public during both world wars. It was a patriotic song designed to galvanize American young men to enlist in the army and fight the "Hun". The song is best remembered for a line in its chorus: "The Yanks are coming."
Resources Edited/Used:
"American Expeditionary Forces - WW1 HD color":
Wikipedia
"Over There" - American Patriotic Song For Country: United States. City: Evansville, Fairfield, Lexington, Providence, Sacramento