What metaphors are used in Rogue Warrior by Richard Marcinko?

Much of the narrative is a metaphor for power and violence. Richard Marcinko is clear that he is willing to fight a dirty war. His only interests are to get his men out alive and kill as many of the enemy as possible. To do this in Vietnam, Richard is willing to interrogate and torture prisoners for information and kill people who may not be enemy soldiers. In a civil war such as in Vietnam, there is a fine line between enemy combatants and civilians, and Richard implies that many times he may have crossed it.