|Author:Laxman Burdak, IFS (R)|
Sabha Parva, Mahabharata/Book II Chapter 27 mentions the countries subjugated by Bhimasena. Vatsabhumi (वत्सभूमि) is in Mahabharata (II.27.9)..... And the mighty son of Kunti then subjugated, by sheer force, the country called Vatsabhumi, and the king of the Bhargas, as also the ruler of the Nishadas and Manimat and numerous other kings.
Military Campaign of Karna: Mahabharata, Book 3, Chapter 252.... Then descending from the mountain and rushing to the east, he reduced the Angas, and the Bangas, and the Kalingas, and the Mandikas, and the Magadhas. the Karkakhandas; and also included with them the Avasiras, Yodhyas, and the Ahikshatras. Having (thus) conquered the eastern quarter Karna then presented himself before Batsa-bhumi.
- निवृत्य च महाबाहुर मथर्वीकं महीधरम, सॊपथेशं विनिर्जित्य परययाव उत्तरा मुखः, वत्सभूमिं च कौन्तेयॊ विजिग्ये बलवान बलात (II.27.9)