I just want to add this tid bit.
I was in the 5th grade choir at Island Elementry in Galveston and we did a program of WW I songs.
Over There, A Long way to Tiparary (sp) etc. My Buddy, was one of the songs. I'm 53 now and it's funny, but I still remenber most of the program, or should I say the songs. Our teacher was Mrs. Littman and she was Jewish....I know she had tears in her eyes as we sang most of the program. There's a difference between WWI & WWII, But I'm sure this song was around before the 30's and it was attached to WWI feelings.