It was formed by the amalgamation of the former Gilgit Agency , the Baltistan District of the Ladakh Wazarat , and the hill states of Hunza and Nagar .
Gilgit Baltistan , which became a single administrative unit in 1970 , was formed from the amalgamation of the Gilgit Agency , the Baltistan District of the Ladakh Wazarat , and the states of Hunza and Nagar .