King Ashoka, son of Bindusara, became the emperor of Mauryan Empire in 268 BC. He is one of the greatest emperor of the Indian subcontinent. Ashoka conquered Kalinga in the violent and bloody war, which is known as the Kalinga War. This is the only war fought by King Ashoka. The casualities are more than 200,000. The region of Kalinga was destroyed and looked bloodshed. This changed the mind of Ashoka. He devoted the rest of his life to 'ahinsa' and 'dharma-vijaya'. He became a Buddhist after this war. King Ashoka made many Rock edicts and Stupas in his empire. The present emblem of India was taken from one of his rock pillars. He was commonly called as Ashoka the Great.