Brilliant! Knowing that Hannibal had a pre-set kill limit, the Romans sent wave after wave of their own soldiers against Hannibal until he returned to Carthage!
Classical Antiquity (~100 BCE)
(media.piefed.social)
Explanation: In the Second Punic War, the brilliant Carthaginian ("Punic") general Hannibal Barca repeatedly lured massive Roman armies into traps, and utterly destroyed them, one after another.
... it took a concerningly long time for the Romans to stumble across the strategy of "Stop feeding Roman soldiers to Hannibal's forces".