Mauryan emperor Ashoka conquered Kalinga,

Historical context:
The Kalinga War took place around 261 BCE during Ashoka’s reign. Kalinga was a prosperous kingdom located on the eastern coast of India.
Geographical identity:
The region of ancient Kalinga corresponds to the modern-day state of Odisha (and parts of northern Andhra Pradesh).
Impact of the war:
The war was devastating, with massive loss of life.
Ashoka was deeply moved by the suffering caused, leading him to embrace Buddhism and adopt the policy of Dhamma (non-violence, compassion, and moral governance).
This marked a turning point in Indian history, as Ashoka spread Buddhist values across Asia.
So, the blank should be filled with Odisha.