The Vatsas were a branch of the Kuru dynasty. During the Rig Vedic period, the Kuru Kingdom comprised the area of Haryana/ Delhi and the Ganga-Jamuna Doab, till Prayag/ Kaushambi, with its capital at Hastinapur. During the late-Vedic period, Hastinapur was destroyed by floods, and the Kuru King shifted his capital with the entire subjects to a newly constructed capital that was called Kosambi or Kaushambi. In the post Vedic period, when Arya Varta consisted of several Mahajanpads, the Kuru Dynasty was split between Kurus and Vatsas. The Kurus controlled the Haryana/ Delhi/ Upper Doab, while the Vatsas controlled the Lower Doab. Later, The Vatsas were further divided into two branches—One at Mathura, and the other at Kaushambi.