A new U.S. Army Field Manual presents an introduction for soldiers to “the warrior ethos” (large pdf).
“Modern combat is chaotic, intense, and shockingly destructive,” the document states. “In your first battle, you will experience the confusing and often terrifying sights, sounds, smells, and dangers of the battlefield–but you must learn to survive and win despite them.”
“The Warrior Culture, a shared set of important beliefs, values, and assumptions, is crucial and perishable. Therefore, the Army must continually affirm, develop, and sustain it, as it maintains the nation’s existence.”
The warrior ethos (or any other) is not instilled simply by reading about it. But the new Army publication provides a common vocabulary and framework of reference for the aspiring warrior, along with basic survival and combat techniques.
See “The Warrior Ethos and Soldier Combat Skills,” U.S. Army Field Manual FM 3-21.75, January 2008 (316 pages in a very large 28 MB PDF file).