 Aurangzeb's Deccan campaign saw one of the largest death tolls in South Asian history, with an estimated 4.6 million people killed during his reign, Muslims and Hindus alike.An estimated of 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.Islam's impact was the most notable in the expansion of trade.