Who gave dritharasasthra a live commentary of the war?

Sanjaya, the charioteer and advisor to King Dhritarashtra, provided him with a live commentary of the Kurukshetra War. Granted divine vision by Sage Vyasa, Sanjaya was able to see the battlefield and narrate the events to the blind king, allowing Dhritarashtra to experience the war vicariously through Sanjaya's descriptions.