Muhammad Bakhtiyar sweeping the town with the broom of devastation, completely demolished it, and making anew the city of Lakhnauti… his metropolis, … - Muhammad bin Bakhtiyar Khalji

In short, when Muhammad Bakhtiyar became aware of the nature of the country, and saw that his men were tired and exhausted, and that many had been slain and disabled in the first day’s march, he consulted with his nobles, and they resolved that it was advisable to retreat, that in the following year they might return to the country in a state of greater preparation. On their way back there was not left on all the road a single blade of grass or a bit of wood. All had been set on fire and burnt. The inhabitants of the valleys and passes had all removed far away from the road, and for the space of fifteen days not a sir of food nor a blade of grass or fodder was to be found, and they were compelled to kill and eat their horses.

Khalji’s military exploits in the east also resulted in conversions to Islam. About the end of the twelfth or the beginning of the thirteenth century, he marched into Bihar and attacked the University centres of Nalanda, Vikramshila and Uddandapur, erecting a fortress at the site of Uddandapur or Odantapuri. The Buddhist monks in these places were massacred and the common people, deprived of their priests and teachers, turned some to Brahmanism and some to Islam. Buddhism did not die out immediately or completely in Bihar. But Bakhtiyar’s raid on Bihar did deliver a shattering blow to Buddhism and its lost followers were gained mainly by Islam.

In the vicinity of this place was perceived a temple, very lofty and strong, and of beautiful structure. In it there were numerous idols of gold and silver, and one very large golden idol, which exceeded two or three thousand miskals in weight. Muhammad Bakhtiyar and the remnant of his army sought refuge in that temple, and set about procuring wood and ropes for constructing rafts to cross the stream. The Rai of Kamrup was informed of the distress and weakness of the Muhammadans, and he issued orders to all the Hindus of his territory to come up, levy after levy, and all around the temple they were to stick their bamboo spears in the ground and to plait them together so as to form a kind of wall. Then the soldiers of Islam saw this they told Muhammad Bakhtiyar that if they remained passive they would all be taken in the trap of the infidels and be made prisoners; some way of escape must be sought out. By common consent they made a simultaneous sally, and directing their efforts to one spot, they cleared for themselves a way through the dangerous obstacle to the open ground. The Hindus pursued them to the banks of the river and halted there. Every one exerted his ingenuity to devise some means of passing over the river. One of the soldiers urged his horse into the water, and it was found fordable to the distance of a bow-shot. A cry arose in the army that a fordable passage was found, and all threw themselves into the stream. The Hindus in their rear took possession of the banks. When the Muhammadans reached the middle of the stream, the water was found to be very deep, and they nearly all perished. Muhammad Bakhtiyar with some horse, to the number of about a hundred, more or less, crossed the river with the greatest difficulty, but all the rest were drowned….