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BABAK'S INVASION OF HINDUSTAN 205 The insurgent governor, Daulat Khan, had already been driven out by the Delhi army, but he was amply avenged by the Kabul troops, who routed the enemy with heavy slaughter and drove them through the streets of Lahore, plundering and burning the bazar. Babar rested only four days in the capital of the Pan- jab, and then pressed on at his best speed to Dipalpur, where he stormed and sacked the town, and massacred the garrison. He appointed some of his most trusty officers to defend the province, and having established 11 Sultan " Ala-ad-din at Dipalpur (with a veteran Mon- gol to watch him), the emperor returned to Kabul to beat up reinforcements. Babar set out on his final invasion of India in No- vember, 1525. His eldest son, Humayun, brought a contingent from Badakhshan, and Khwaja Kalan, trus- tiest of generals, led the troops of Ghazni. Daulat Khan, after deceiving the invaders with pretended sup- port, was now in the field against them at the head of forty thousand men, and the old Afghan had girded on two swords in token of his resolve to win or die. Nevertheless, this valiant army broke and vanished at Babar 's approach with a far less numerous force, and the emperor continued his advance. The decisive battle was fought on April 21, 1526, on the plain of Panipat the historic site where the throne of India has thrice been won. For several days Babar was busy with his preparations. Following the Osmanli order of battle, as he himself says, he collected seven hundred gun-carts, and formed a laager by linking