Chandragupta Maurya and Asoka in their early days began to expand their empire with conquering weak kingdoms in the neighbour surrounding. Chandragupta toward the end of his reign, famine hit in India, which devastated the emperor. Chandragupta gave up the throne and fasted for days. Ashoka was Chandragupta Maurya's grandson, who also known as a great emperor. After the battle in Kalinga, he went to the path of non-violance and embrace Buddhism.
