For some reason I'd never read John Stryker Meyer's Across the Fence, an oral history of MACV-SOG. I'm only 1/4 or so into the book, but really like the story of John Walton, an SF medic who earned a Silver Star when his team was attacked, took over the team when the others were wounded, called in airstrikes on his position, etc. Arriving back at the FOB he accompanied a teammate with a leg amputation to the ER. A surgeon couldn't start an IV, so Walton stood there and told him to do a cutdown, not leaving until his guy was treated.
Before his death in 2005, John Walton was one of the richest men on the planet...as the heir to the Walmart fortune.