Policy and the means to carry out that Policy must Harmonize
"If war is to harmonize entirely with the political views, and policy to accommodate itself to the means available for war, there is only one alternative to be recommended when the statesman and soldier are not combined in one person (note, as William of Orange, Frederick the Great, or Napoleon), which is to make the chief commander an ex-officio member of the Cabinet, that he may take part in its councils and decisions on important occasions."
"The influence of any military man except the general-in-chief in the Cabinet is extremely dangerous; it very seldom leads to able, vigorous action."