⇒ The most important event of Asoka’s reign was his victorious war with Kalinga in 261 B.C. → Although there is no detail about the cause and course of the war, the effects of the war were described by Asoka himself in the Rock edict XIII : “A hundred and fifty thousand were killed and many times that number perished...”. → After the war, he annexed Kalinga to the Mauryan Empire.