The question asks to identify the king of Ratanpur during whose rule the Maratha Commander Bhaskar Pant launched an attack. This is a significant historical event in the history of Chhattisgarh, specifically related to the Kalachuri dynasty of Ratanpur.

Ratanpur Kingdom and Maratha Invasions

The Ratanpur branch of the Kalachuri dynasty was a prominent power in Chhattisgarh for centuries. However, during the 18th century, the Maratha Empire, under the leadership of the Peshwas, began expanding its influence across India, including regions of present-day Chhattisgarh. These invasions often targeted wealthy kingdoms, and Ratanpur was one such target.

Bhaskar Pant's Attack on Ratanpur

Maratha Commander Bhaskar Pant was a key figure in the Maratha expansion into Chhattisgarh. He led a significant campaign that resulted in the subjugation of the Kalachuri kingdom of Ratanpur. This attack is a pivotal event marking the decline of the Kalachuri rule and the beginning of Maratha dominance in the region.

• Bhaskar Pant's expedition into Chhattisgarh occurred in 1741 AD.
• His main objective was to expand Maratha control and collect revenue.
• The Kalachuri king of Ratanpur at this time was Raghunath Singh.

King Raghunath Singh's Tenure

Raghunath Singh was the last independent king of the Kalachuri dynasty of Ratanpur. His reign witnessed the formidable Maratha invasion led by Bhaskar Pant. Unable to withstand the powerful Maratha army, Raghunath Singh eventually surrendered to Bhaskar Pant. This surrender marked the end of the long-standing Kalachuri rule in Ratanpur and the establishment of Maratha supremacy in the area. After this event, Ratanpur came under direct Maratha control, initially as a tributary state, and later fully integrated into the Maratha Empire.

Therefore, the Maratha Commander Bhaskar Pant attacked during the tenure of King Raghunath Singh of Ratanpur.