Q. Murarbaji Deshpande, a prominent general of the early Maratha Empire during the rule of Chhatrapati Shivaji, is best known for his valiant defense of which historic fort against the Mughal forces led by Dilir Khan and Jai Singh I?
Answer: Purandar Fort
Notes: Murarbaji Deshpande heroically defended Purandar Fort in 1665 against Mughal forces under Dilir Khan and Jai Singh I. His leadership and sacrifice are legendary in Maratha history. Purandar Fort is located near Pune, Maharashtra, and was a key stronghold in the Maratha Empire.