Much of the conventional wisdom associated with Vietnam was highly inaccurate. Far from an inevitable result of the imperative to contain communism, the war was only made possible through lies and deceptions aimed at the American public, Congress, and members of Lyndon Johnson's own administration.
In the Army, because the stakes are so high - right? - you can't just be a yes-man and say, 'Great idea, boss!' if you don't believe it - right? - because lives are at stake. And the commanders that I've worked for, they want frank assessments; they want criticism and feedback.
Some people have a misunderstanding about the Army. Some people think, 'Hey, you're in the military, and everything is super-hierarchical, and you're in an environment that is intolerable of criticism, and people don't want frank assessments.' I think the opposite is the case.