Excerpt:
"Marshall has been recognized as a textbook model for the way military officers should handle disagreements with superiors and in particular with the civilians vested with control of the armed forces under our Constitution. So your duties as an officer are:
· To provide blunt and candid advice always;
· To keep disagreements private;
· And to implement faithfully decisions that go against you. "
http://www.defenselink.mil/speeches/speech.aspx?speechid=1233