I found these relevant, interesting or thought provoking.
https://www.youtube.com/watch?v=9wlo7hqil-w Goodbye Dolly Grey.
https://www.youtube.com/watch?v=HJdh1M5PGTg The Road to Passchendaele
https://www.youtube.com/watch?v=mPLS5nNFWTU Tipperary
https://youtu.be/F5gd0Tm5r1A Pack up Your Troubles
https://www.youtube.com/watch?v=1-ihJiOftgM Long Long Trail
https://www.youtube.com/watch?v=yNPMudwlrd0 Until
https://www.youtube.com/watch?v=6v__2Ri7HQQ I Hear you Calling Me
Pack up Your Troubles.
Private Perks is a funny little codger
With a smile a funny smile.
Five feet none, he's and artful little dodger
With a smile a funny smile.
Flush or broke he'll have his little joke,
He can't be suppress'd.
All the other fellows have to grin
When he gets this off his chest, Hi!
Chorus (sung twice after each verse)
Pack up your troubles in your old kit-bag,
And smile, smile, smile,
While you've a lucifer to light your fag,
Smile, boys, that's the style.
What's the use of worrying?
It never was worth while, so
Pack up your troubles in your old kit-bag,
And smile, smile, smile.
Second Verse
Private Perks went a-marching into Flanders
With his smile his funny smile.
He was lov'd by the privates and commanders
For his smile his funny smile.
When a throng of Bosches came along
With a mighty swing,
Perks yell'd out, "This little bunch is mine!
Keep your heads down, boys and sing, Hi!
Third Verse
Private Perks he came back from Bosche-shooting
With his smile his funny smile.
Round his home he then set about recruiting
With his smile his funny smile.
He told all his pals, the short, the tall,
What a time he'd had;
And as each enlisted like a man
Private Perks said 'Now my lad,' Hi!