The Celtic Carnyx is an ancient war trumpet used by the Celts from around 200 BC to 200 AD.

An instrument of psychological warfare; its loud and eerie sound was designed to intimidate enemies on the battlefield.

The Roman army feared it.

https://video.nostr.build/20f54a895e4b4b711de271b7a4a344d637c9a665b75b894c0f0385728a18e4e1.mp4