The phrase "rule of war" is grammatically correct and usable in written English.
It is typically used to refer to the set of established regulations that govern the conduct of warfare. For example, "The Geneva Convention outlines the rule of war that must be respected in all conflicts."
PATTON'S first rule of war -- get the other poor blankety-blank before he gets you -- doesn't work with ragweed.
We must refuse to accept strikes on facilities and staff as aberrations or – worse – as a new rule of war, if doctors and the patients they so courageously serve are to be protected.
Afghanistan has had forms of national rule in its history, but for more than 20 years, the norm has been the rule of war, a state of affairs that the country could slip seamlessly back into unless the United States and United Nations act quickly to slow down the rapid entrenchment of the warlords, diplomats and experts said.
There is a terrible rule of war.
An unwritten rule of war states that no soldier shall be left behind.
So she's spent a lot of time performing fairly shameless topspin on this one: "I went to work in that system because the first rule of war is 'know your enemy'," she declared.
"Amal is a human-rights lawyer who worked on the Enron case, was an adviser to Kofi Annan regarding Syria, and was selected of a three-person U.N. commission regarding rules-of-war violations in the Gaza Strip.
If we practiced equivalence as a rule of warfare, war would not take place without an actual provocation.
We both understood it was the rules of war".
The deliberate slaughter of civilians would, by the rules of war, be a crime.
On August 12th 1949 the four Geneva Conventions covering the rules of war were agreed.
