What is the author's tone in In Pharaoh's Army: Memories of the Lost War by Tobias Wolff?

"In Pharaoh's Army, Memories of the Lost War," by Tobias Wolff is written in an introspective tone that recalls the author's year in Vietnam in the midst of the country's raging civil war. His recollections summon a blend of the tragic and the absurd and his tone is appropriate in his description of both. He speaks of his desolation when he sees in a random newspaper article that his best friend from recruit training is dead. His reaction of one of sadness blended with outrage.