The Panchala kingdom (Mahabharata) extends from the Himalayas in the north; to the Charmanwati river; with the Kuru, Surasena and Matsya kingdoms to the west; and the Naimisha Forest to the east. Later, Panchala was divided into Southern Panchala (Panchala proper, centered at Kampilya, ruled by King Drupada, the father-in-law of Pandavas); and Northern Panchala (centered at Ahichatra, ruled by Ashwathama, the son of Drona. Drona was Drupada's friend who later became his enemy). The Ganges River separated the two Panchalas.