Rajadhiraja Chola was declared crown prince / Co-regent as early as 1018 AD during time of his father Rajendra Chola I. He ruled with full regal status and was leader of the most of the military conquests of his father including that of Ceylon. He emphasized his claim to a paramount power by performing an Ashwamedha Yajna. In 1059, he was killed in the Battle of Koppam near Mysore, while fighting with the Chalukyas. He was killed on the back of the elephant and this is why he came to be known as_______________________.