What is the author's tone in With the Old Breed, at Peleliu and Okinawa by E. B. Sledge?

The text is related in a somber tone, devoid of sentimentality. The texture is gritty and captures the essential horror of combat. Each chapter of the text uses a slightly altered tone that is suitable to the events being discussed. For example, the tone used in the State-side pre-combat training is less intense and slightly more open than the tone later used to present combat on Peleliu. This is not to say the memoir features an uneven tone; rather, the tone is constructed such that it matches the material considered and as such it develops throughout the text.