Prior to 1966, the Cordillera region was administered under one unit, the old
Mountain Province.
Abra has been its own independent province. In June 1966, the province was divided into smaller provinces—namely, Abra,
Benguet,
Ifugao,
Mountain Province, and
Kalinga-Apayao Under the Regionalization Law or Presidential Order No. 1 issued by President
Ferdinand Marcos, the Philippines' provinces were organized under 13 regions. The Cordilleran provinces were grouped under two separate regions: Benguet (including
Baguio) and Mountain Province were included under Region I (Ilocos Region), and Ifugao and Kalinga-Apayao were included under Region II (Cagayan Valley). to independently launch an armed struggle fight for
self-determination of the people of Cordillera. ==Deal==