The source is the late Delhi Univ history professor K.S. Lal. But his claim is not that 80 millions were physically killed by the invaders/occupiers,… - K. S. Lal

I have tried my utmost to be judicious in my conclusions, and have neither explained an act or policy to the extent of excusing, nor have I uncritically dispraised or blamed.

Study of history has a value at all times. But it is of the utmost importance today when the world is shrinking and we are coming closer to one another. We can be nearer to one another better if we understand one another well. (Meaning and Purpose of History in Volume I)

During the reigns of Nasiruddin and Balban (1246-86) warfare for consolidation and expansion of Turkish dominions went on apace. Trailohyavarman, who ruled over Southern U.P., Bundelkhand and Baghelkhand, and is called ‘Dalaki va Malaki’ by Persian chroniclers, was defeated alter great slaughter (1248). In 1251, Gwalior, Chanderi, Narwar and Malwa were attacked. The Raja of Malwa alone had 5,000 cavalry and 200,000 infantry and would have been defeated only after great loss of life. The inhabitants ofKaithal were given such severe punishment (1254) that they ‘might not fotgtt (the lesson) for the rest of their lutes’: In 1256 Ulugh' Khan Balban carried on devastating warfare in Saimur, and ‘so many of the rebellious Hindus were killed that numbers cannot be computed or described’. Ranthambhor was attacked in 1259 and ‘many of its valiant fighting men were sent to hell’. In the punitive expedition to Mewat (1260) ‘numberless Hindus perished under the merciless swords of the soldiers of Islam’. In the same year 12,000 men, women and children were put to the sward in Hariyana.