Doughboy Jack and Doughnut Jill
Hinky-Dinky-Parlez-Vous (Mademoiselle from Armentières)
I Don't Want to Get Well (I'm in Love with a Beautiful Nurse)
I Know Where the Flies Go in Wintertime
I'm Glad My Wife's in Europe
K-K-K-Katy
They Were All Out of Step but Jim
Those Wild, Wild Women Are Making a Wild Man of Me

Source
Canadian nurses during the First World War

Source
Geoffrey O'Hara's "K-K-K-Katy" continued to be popular after the war ended; Toronto Daily Star, November 27, 1918, p. 23