I think this commercial recording was fairly popular. Although its ethos seems to stem from WW2, it didn't appear until 1949.

SHE WORE A YELLOW RIBBON
As sung by the Andrews Sisters

1. Round her neck she wore a yellow ribbon.
She wore it in the winter and the merry month of May.
When I asked her "Why the yellow ribbon?"
She said, "It's for my lover who is far, far away."
Far away (far away), far away (far away),
She said, "It's for my lover who is far, far away."
Far away (far away), far away (far away),
She said, "It's for my lover who is far, far away."

2. When at first she met her winsome Johnny,
He wasn't sure her heart was pure; her eyes were far too bold.
Round her neck he tied a yellow ribbon.
He tied a yellow ribbon 'cause it matched her hair of gold,
Hair of gold, hair of gold.
He tied a yellow ribbon 'cause it matched her hair of gold,
Hair of gold, hair of gold.
He tied a yellow ribbon though her eyes were far too bold.

3. If perchance you spy a lovely maiden,
And by her side there walks with pride a Johnny strong and gay,
Round her neck there is a yellow ribbon,
No matter how you love her, please stay far, far away.
Far away (far away), far away (far away),
No matter how you love her, please stay far, far away.
Far away (far away), far away (far away),
Her love is for another, so stay far, far away.

REPEAT VERSE 1.