“First time I heard that was at my Grammas house when I was about 7 years old.”
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I had an older bro who was in Nam when the song came out. Though he wasn’t a Green Beret, but when you’re a kid it doesn’t matter - you just feel pride.
“Liar, Liar” by The Castaways
https://www.youtube.com/watch?v=DDEdFxUZ01s