Uniformed officers have an obligation to stand up to civilian leaders if they think a policy is flawed. But once a policy decision is made, soldiers are obligated to carry it out. The idea that a general or admiral should publicly attack government policy and its civilian authors in time of war is dangerous.
Owens, Mackubin Thomas
"Rumsfeld, the Generals, and the State of U.S. Civil-Military Relations,"
Naval War College Review: Vol. 59
, Article 6.
Available at: http://digital-commons.usnwc.edu/nwc-review/vol59/iss4/6