Kalinga was a eastern cost kingdom of India. It included large part of Odisha, Northern Andhra Pradesh and small part of chhattisgarh. It was an independent Kingdom. Kalinga fought against Mauryan empire in 261 BC and Mauryan empire was led by Asoka. The effects of the war were described by Asoka himself in the Rock edict XIII. Around 1,50,000 were killed during this war.