What other nations use "OO-RAH!" (the title of the piece) as a motivational cry?
He is an American so when he says "our troops in places like Afghanistan" which nation do you think he means?
"And it is why the Pentagon is repeatedly surprised when after the swoosh and scream of the jets over Kabul, or Quang Tri, or Baghdad"
Pentagon: check
Kabul: check
Quang Tri: check
Baghdad: check
Yep, seems to be referencing the US military here.
He also references: “Death from Above!” “The most dangerous thing in the world is a Marine with his rifle.” - Both, I believe, are US military slogans.
It is apparent to me that he is necessarily discussing American soldiers.