rape the lot of them until they beg us for death in front of all the prisoners, then pull up their pants, but leave the fly unziped so that their cocks are hanging out, then kill each of them a different way, first one, tied to a stake and a firing squad, target is his exposed cock. second one, use a welding torch on his cock, figure that the slow deaths of the first two will give the rest of the prisoners a good idea of the fate they will face.