If fighting is sure to result in victory, then you must fight, even though the ruler forbid it; if fighting will not result is victory, then you must not fight, even at the rulers bidding.Obama had egg on his face when the positive results of the Fallujah surge (which he opposed as senator) were announced. Imagine a general that followed Sun Tzus maxim and did not let opportunities slip away, the least of which was to keep the ambassadors in Benghazi safe?
The Art Of War, 10:23
“when faced with a choice between war and dishonor, when one chooses dishonor then the result will still be war. “
War is more likely today than during the Cold War for the very reason you quoted.
"Every attempt to make war easy and safe will result in humiliation and disaster."
~William T. Sherman