'Chhaava' is based on the life and times of Chhatrapati Sambhaji Maharaj - the second ruler of the Maratha Confederacy and son of Chhatrapati Shivaji Maharaj
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source https://sports.ndtv.com/cricket/not-taught-about-sambhaji-in-school-ex-india-stars-akbar-aurangzeb-statement-on-chhaava-starts-debate-7733731#rss-sports-cricket