Mirpur became part of Kashmir in 1846 as part of the treaty of Amritsar between the British and the Maharaja Gulab Singh.Before the treaty Mirpur was part of the Punjab. Although they are citizens of Kashmir the peoples of Mirpur are ethnic Pahari's in much the same way as Attock has a large Pashtun population even though it only became part of the Punjab in 1970 when Ayub Khan removed it from Khyber Pakhtunkhwa.