To clarify I don’t necessarily mean the very first time firearms were used in combat ever in all of history (I’d love to hear it if it exists) but more of an army that didn’t know of firearms encountering them for the first time. I’m sure some exist out there but I can phrase the question well enough to get much help with Google. The perspective of the non-gunpowder having side is what I think would be most fascinating to hear.

I’d assume some, if not most, would come from the many conquests of native peoples all over the world and may live on in oral or written histories today. But to the exacts I am unaware.

The scenario me and my history geek friends hypothesized was like medieval knights and men at arms encountering artillery and guns for the first time and how absolutely terrifying that must have been even for professional soldiers. We also guessed that in the battle once shots started to land it would have caused mass panic and ended in a rout.

Do we have anything known remaining to us about these situations from the more primitive side?