Johnnie, get your gun,A great collection of music from World War I. Simply fantastic stuff. You can listen to the songs on recordings that date from the war itself. Nora Bayes, John McCormack, Eddie Cantor and many others. This is the kind of web page that makes the internet so great.
Get your gun, get your gun,
Take it on the run,
On the run, on the run.
Hear them calling, you and me,
Every son of liberty.
Hurry right away,
No delay, go today,
Make your daddy glad
To have had such a lad.
Tell your sweetheart not to pine,
To be proud her boy's in line.
Over there
And, from NPR, a short snippet on the fourteen living American WWI vets. The youngest is 106 years old.