about a fifth of his army fighting rebellions led by the Marathas in Deccan India. He travelled a long distance to the Deccan to conquer the Marathas and eventually died at the age of 88, still fighting the Marathas. Aurangzeb's shift from conventional warfare to anti-insurgency in the Deccan region shifted the paradigm of Mughal military thought. There were conflicts between Marathas and Mughals in Pune, Jinji, Malwa and Vadodara. The Mughal Empire's port city of Surat was sacked twice by the Marathas during the reign of Aurangzeb and the valuable port was in ruins. Matthew White estimates that about 2.5 million of Aurangzeb's army were killed during the Mughal–Maratha Wars (100,000 annually during a quarter-century), while 2 million civilians in war-torn lands died due to drought, plague and famine. Ahom campaign While Aurangzeb and his brother Shah Shuja had been fighting against each other, the Hindu rulers of Kuch Behar and Assam took advantage of the disturbed conditions in the Mughal Empire, had invaded imperial dominions. For three years they were not attacked, but in 1660 Mir Jumla II, the viceroy of Bengal, was ordered to recover the lost territories. The Mughals set out in November 1661. Within weeks they occupied the capital of Kuch Behar, which they annexed. Leaving a detachment to garrison it, the Mughal army began to retake their territories in Assam. Mir Jumla II advanced on Garhgaon, the capital of the Ahom kingdom, and reached it on 17 March 1662. The ruler, Raja Sutamla, had fled before his approach. The Mughals captured 82 elephants, 300,000 rupees in cash, 1000 ships, and 173 stores of rice. On his way back to Dacca, in March 1663, Mir Jumla II died of natural causes. Skirmishes continued between the Mughals and Ahoms after the rise of Chakradhwaj Singha, who refused to pay further indemnity to the Mughals and during the wars that continued the Mughals suffered great hardships. Munnawar Khan emerged as a leading figure and is known to have supplied food to vulnerable Mughal forces in the region near Mathurapur. Although the Mughals under the command of Syed Firoz Khan the Faujdar at Guwahati were overrun by two Ahom armies in 1667, but they continued to hold and maintain presence in their eastern territories even after the battle of Saraighat in 1671. The battle of Saraighat was fought in 1671 between the Mughal empire (led by the Kachwaha