At the close of the reign of Vimaladitya (1011 – 1018 C.E.) the succession to the Vengi throne was in dispute. His son Rajaraja Narendra, through the Chola princess Kundavai, was appointed crown prince and succeeded his father on the throne of Vengi. But Vijayaditya VII, who was the stepbrother of Rajaraja Narendra, seized power with the help of Jayasimha II, the Western Chalukyan ruler. Rajaraja Narendra naturally sought the help of his maternal uncle and overlord, the Chola emperor Rajendra Chola I. The latter promptly dispatched forces to his aid. Rajendra continued the tradition of fighting on two fronts in the north, which was started by Rajaraja Chola, as well. Rajendra Chola I sent a powerful army against Rattapadi to divert the attention of Jayasimha II and prevent him from sending effective help to Vijayaditya VII. With this, the king of Kalyani was compelled to take steps for the defence of his kingdom.