What is the author's tone in the nonfiction book, Into the Fire: A Firsthand Account of the Most Extraordinary Battle in the Afghan War?

Dakota Meyer's war memoir is written using a morose, argumentative and disappointed tone as he details the events that transpired at Ganjigal and his guilt over the deaths of his teammates. Written as a memory, "Into the Fire" provides honest, astute details concerning the military failures at Ganjigal.