On sale at amazon.ca
A Rumor of War by Phillip Caputo for $CDN 3.99
https://www.amazon.ca/Rumor-War-Clas.../dp/B0039PH70O
Goodreads page:
https://www.goodreads.com/book/show/...a-rumor-of-war
Lt. Caputo went to Vietnam as a Marine platoon leader in the first ground combat unit comitted to Vietnam. I read this almost 40 years ago and found it powerful then.
Lincoln's Lieutenants: The High Command of the Army of the Potomac by Stephen Sears for $CDN 2.99
https://www.amazon.ca/Lincolns-Lieut.../dp/B01912OXKK
The Goodreads page:
https://www.goodreads.com/book/show/...-s-lieutenants