( something ) pacem, parabellum.
BTW, Ghost, do you or anyone recall the details of the situation, players, and words ( uttered in middle french, later translated into latin ). The putatively good Cardinal, on the seizure of a city held by heretical forces was advised of the difficulty separating the faithful from the heretics. He replied: "Kill them all, God will know his own"? This is where the old spec for saying to "Kill them all, let God sort them out" originally came from.