Insofar as these two nations are, de facto, the arbiters of last resort within Europe, they have a responsibility to have (secret or not) rules of engagement which will govern any military intervention in Europe.

This is no more unthinkable, in itself, than contemplating the use of nuclear weapons.

If the politicians have never thought about this, then it's time they did.

_{It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II}