As Dave is a combat experienced Marine who fought, and lost friends, fellow Marines in Vietnam, ....
On a related note, I recently had an opportunity to tour the War Remnants Museum in Ho Chi Minh City (Saigon). Highly recommend it if you have an interest in the subject. It is located walking distance from Independence Palace which is also very interesting.
Dave, I worked with the Marines in February 1968 when I was in the Navy in Hue. I've never seen such bravery and unquestioned obedience to orders in my life. Me? I was a coward and questioned most every order except at ease.