Ricvenart wrote...
"Because the punishment fell by lot, all soldiers in the group were eligible for execution, regardless of the individual degree of fault, or rank and distinction. The leadership was usually executed independently of the one in ten deaths of the rank and file"
How is that relatable to getting rid of cowards and weaklings? How would having Shepard executed for being the 1 in 10 or leader help? You may have had a point as many armies have excluded weak links from joining to keep the unit as one strong chain, but all you want to do is commit genocide to use as a weapon of terror, while people are being killed...Frankly though it's all in your name, thank god for the most part ideas like that have died out with good reason.
The point was that the soldiers were judged on the basis of the unit they served in. If the unit committed a "cowardly act", all in it were responsible. In that sense, it's similar to any barrack-room punishment in which the group suffers for the actions of a single member of it. Private Pyle sneaks in food, the whole unit gets extra PT, and his bunkmates promptly beat six shades of **** into him to try to force him to change his ways. Decimation, similarly, was intended to either kill off the "weakest links" or terrify them into never repeating whatever they did.
It wasn't genocide, that's silly. Killing off ten percent of a given military unit has nothing to do with large-scale ethnic violence. And it's not really mass murder, either. Outrageously excessive punishment? Well, yeah. If you ride your men too hard, they'll just figure they've got nothing to lose by fighting against you instead of the enemy.