Seconding the suggestion of The Jarkarta Method by Vincent Bevins.

I’d also recommend Kill Anything That Moves by Nick Turse. It’s about official US armed forces policy that they literally “kill anything that moves” during the Vietnam War. There’s an interview with a soldier in the book where he says that the My Lai Massacre wasn’t an anomaly, it was just the one that people found out about back home, and that really there was a My Lai happening every month.

I listened to both of these as audiobooks. Which was odd for me, while I like audiobooks they don’t make up much of my reading time in a given year, and I’ve never before listened to nonfiction. But I didn’t regret it. Kill Anything That Moves has been uploaded to YouTube.