Pyrrhic victory

Pyrrhic victory is a victory that inflicts such a devastating toll on the victor that it is tantamount to defeat. A Pyrrhic victory takes a heavy toll that negates any true sense of achievement or damages long-term progress.

The phrase originates from a quote from Pyrrhus of Epirus, whose triumph against the Romans in the Battle of Asculum in 279 BC destroyed much of his forces, but the tactical victory forced the end of his campaign.