It's Asoka. He was actually a very cruel warrior and ruthless ruler. But he was filled with regret and guilt. Therefore, hearing about the religion of Buddhism, he converted, hoping to find a path of redemption. He is known as the first Buddhist Emperor.
This is the link to a Crash Course lesson that'll help you understand the concept in depth:
Asoka was f<span>illed with remorse about his life of cruel conquest, he converted to Buddhism and sent Buddhist missionaries throughout eastern Asia.</span><span> </span><span>Ashoka the Great was an Indian ruler of the Maurya Dynasty who controlled nearly all of the Indian subcontinent .</span><span> </span>
