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In page Alamgir II:

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In 1758 the Marathas led by Raghunathrao occupied Lahore after extracted an extortion of imperial wealth from Imad-ul-Mulk, together they conspired the overthrow of young Timur Shah Durrani. Raghunathrao drove out Jahan Khan and Timur Shah Durrani, the son and viceroy of Ahmad Shah Durrani. Timur Shah Durrani and his forces were forced to retreat from Lahore to Peshawar under the force of attacks from Sikhs and Marathas. This victory made the belligerent Peshwa, grandiosely sack Delhi and hype their intentions of placing Vishwasrao on the Mughal throne.[1]