The Myth of Decimation as Routine Punishment
You picture Roman officers casually killing every tenth man in a legion at the first sign of failure—'decimation' as an everyday terror tactic.

Joos van Wassenhove — "The Adoration of the Magi" (1472–74), public domain
Decimation on Every Battlefield?
Movies make it seem like Roman commanders decimated their own troops on a whim—every tenth man slaughtered if the line broke or discipline slipped. The ultimate symbol of iron Roman cruelty.
An Extreme—and Rare—Event.
In reality, decimation was shockingly rare. Roman historians mention just a handful of cases, like Crassus in 71 BCE after a mutiny. Commanders dreaded using it—it shattered morale and brutalized units. Most Roman discipline relied on fines, flogging, or demotion, not mass execution.
How Did the Myth Spread?
Later writers fixated on the drama of decimation, making it seem emblematic of Roman discipline. Hollywood ran with it, too—turning a rare horror into a routine event.
Decimation was a last-resort punishment, so rare that it shocked Romans themselves when it happened. Records show only a handful of cases across centuries.