Hill People
From Memory Alpha, the free Star Trek reference.
The Hill People was one of the tribe on the planet Neural. The female leaders of the Hill People were shamans known as the Kahn-ut-tu.
When the USS Enterprise visited the planet in 2268, the Hill People were warring with a tribe from a nearby village, armed with flintlock firearms provided to them the prior year by a group of Klingons. Captain Kirk violated the Prime Directive and armed the Hill People, helping them to fight the Klingon-backed tribes. (TOS: "A Private Little War")
