THE TRAMP OF CENTURIES 17 of cavalry and passing through Kabul came down through the Khyber Pass as far as Delhi, which he sacked for five days and where he massacred 100,000 male Hindu prisoners of war, building a tower out of their skulls. ** After him/' to quote Fielding King Hall, " not a bird moved wing for whole two months in Delhi." His ostensible reason for the expedition was the fact that as a strict Muslim he was " disgusted by the tolerance which the then Mohammedan rulers of Delhi were extending towards Hinduism ".* During Akbar's well-ordered and tolerant reign, East- ern Baluchistan and the great Persian fortress of Kandahar were added to the northern dominions and continued to form part of the Moghal Empire till after the reign of Aurangazeb. During the latter's reign and towards the close of his father Emperor Shah Jehan's reign, trouble arose beyond the Indus due to the Yusufzai rising and the rising of the Khattaks respectively, and was put down by sending out retaliatory columns against them. After the initial reverse of the Moghal arms, the Khattaks joined the Afridi confederacy and there was a general rising " from Kandahar to Attock ". The Emperor himself con- ducted operations (1664 A.D.) to reduce theYusufzais-and " by skilful diplomacy contrived to bring the situation well in hand ". His policy, which was the precursor of the policy later followed by the British Government, was " to set one tribe against another and to subsidize their chiefs into keeping peace on the Frontier, where the establish- ment of military posts proved less effective J'.f Nadir Shah, the Persian monarch, overran the Frontier province in 1739 A.D. when he crossed the Indus, just as Timur the Lame had done in 1388, carrying fire and sword wherever he went. After his assassination in 1739 Ahmed Shah Abdali (1747-1773) formed the Provin- ces of Kandahar, Kabul and Ghazni, along with the area * Cited by Fielding King Hall in Thirty Days of India, p. 1SS. fDewan Chand Obhrai: The Evolution of North-West Frontier Province, p. 23.