Kill One in Ten.
Originally from the Latin: decimatio (decem – ten). Historically decimation was a form of military discipline used by senior commanders in the Roman Army to punish units or large groups guilty of capital offences, such as cowardice, mutiny, desertion, and insubordination, and for pacification of rebellious legions.
It has since come to mean to kill, destroy, or remove a large percentage or part of, as “the project would decimate the fragile wetland wilderness.” Or more recently, “the hurricane decimated everything in its path.”
Graham Greene wrote about this concept, in the historical sense, in his novel, The Tenth Man.
A group of Frenchmen were being held hostage in a Gestapo camp. A German officer enters the cell one afternoon and announces that there were three murders in the town last night. He is ordered to shoot one in ten of them in the morning. There are thirty men in the camp, therefore three men must be shot. He doesn’t care who. They choose. They chose by lot. Louis Chavel was the tenth man.
Things get tricky from there, but Greene supplies a heavy dose of irony as the plot unfolds.