Saraswata Kingdom was an ancient kingdom, territory or region that was situated on the banks of the river Sarasvati River during the pre-historic ages. This region is mentioned in detail in as many as 20 chapters in the Mahabharata from (9:35) to (9:54). The Yadava Balarama traced the Saraswati river through its partially dried up course from the ocean near Prabhasa (close to Dwaraka) to its origin in the Himalayas.
References
Saraswata Kingdom Wikipedia(Text) CC BY-SA