It’s called “Minstrel Boy” from original score to “Black Hawk Down” by Dominik Hauser.
(I wondered, too, so did Shazam.)
Thanks!
Hans Zimmer did the score to Blackhawk Down. I know because it’s a favourite as is Hans.
I’ve only recently discovered in the last year Minstrel Boy...but not through Bannon...just on my own. I thought the singer sounded like Joe Strummer of The Clash. Just looking it up now and it is him.