Magadha was a kingdom ruled by Vedic civilization kings. Jarasandha was the greatest among them during epic times. His capital was Rajagriha or Rajgir a modern hill resort in Bihar. Jarasandha's continuous assault on the Yadava kingdom of Surasena resulted in their withdrawal from central India to western India. Jarasandha was a threat not only for Yadavas but also for Kurus. Pandava Bhima killed him in a wrestling duel. Thus Yudhishthira, the Pandava king, could complete his campaign of bringing the whole of Indian kingdoms to his sway, release the imprisoned kings and start his preparations for the Rajsuya sacrifice.