The documented history of Manipur begins with the reign of the Meetei King of Ningthouja clan Nongda Lairen Pakhangba (dragon king/god) (r. 33–154 AD), who unified the seven clans of Meetei society. Introduction of the Vaishnavism school of Hinduism brought about changes in the history of the state. Manipur's early history is set forth in the Cheitharon Kumbaba, a chronicle of royal events which is believed to record events from the foundation of the ruling dynasty. Since ancient times, the Meetei people have lived in the valleys of Manipur alongside the Nagas, and Kukis in the hills. Meetei Pangal peoples[clarification needed] settled in the valleys during the reign of Meidingu Khagemba in the year 1606. Since then, they also lived along with the Meetei Peoples.