In the 1950s, Rawalpindi was smaller than Hyderabad and Multan, but the city's economy received a boost during the building of Islamabad (1959–1969), during which Rawalpindi served as the national capital. Rawalpindi is in the northernmost part of the Punjab province, located 275 km (171 mi) to the north-west of Lahore. It is the administrative seat of the Rawalpindi District. Also, Rawalpindi is the military headquarters, also referred to as GHQ (General Headquarters) of the Pakistani Armed Forces.