 Between 1965–1984, this mountainous area was a battleground in the fight between the Thai communist party and the Royal Thai Army.Neighboring districts are (from the east clockwise) Lom Kao, Lom Sak and Mueang Phetchabun of Phetchabun Province, Noen Maprang, Wang Thong and Nakhon Thai of Phitsanulok Province, and Dan Sai of Loei Province.The Phetchabun Mountains are a mountain chain in Khao Kho.