I guarantee something similar happened at some point in history.

Bluffing is one of the oldest defense strategies in the universe, and predators are often confused enough into retreat if prey does it.

Look at cats and dogs. Cats hiss and swat and the dog runs off.

If a raider encountered a target where even the women acted as though they were trained and ready for a fight, that raid is possibly twice as dangerous for them as the next village over, so they'd likely just move on.