In the absence of orders, go ...

In the absence of orders, go find something and kill it.
 Erwin Rommel

Quotes from the same author

One of the most important factors, not only in military matters but in life as a whole, is ... the ability to direct one's whole energies towards the fulfillment of a particular task.
 Erwin Rommel
The peril of the hour moved the British to tremendous exertions, just as always in a moment of extreme danger things can be done which had previously been thought impossible. Mortal danger is an effective antidote for fixed ideas.
 Erwin Rommel
In Tunisia the Americans had to pay a stiff price for their experience, but it brought rich dividends. Even at that time, the American generals showed themselves to be very advanced in the tactical handling of their forces, although we had to wait until the Patton Army in France to see the most astonishing achievements in mobile warfare.
 Erwin Rommel
Anyone who has to fight, even with the most modern weapons, against an enemy in complete command of the air, fights like a savage against modern European troops, under the same handicaps and with the same chances of success.
 Erwin Rommel
Sweat saves blood, blood saves lives, but brains saves both.
 Erwin Rommel