 In 1653 Shah Jahan sent Dara Shikoh, with a large army and two of the heaviest artillery pieces of the empire, but after a five-month siege the Mughals couldn't manage to starve the city, and the attempt to breach their walls by cannon fire also failed.The Mughals finally gave up all attempts to recover Kandahar.The tribes of the region of the Hindu Kush were often rebellious and had to be constantly pacified, disciplined, or eliminated.