Decimation was a military punishment. I cannot think of any time it was used on civilians. It was employed not just for mutiny, but for desertion and cowardice.

Decimation was a military punishment. I cannot think of any time it was used on civilians. It was employed not just for mutiny, but for desertion and cowardice. If your unit panicked and routed during a battle, it might very well be subjected to decimation later - probably a powerful motivator.