The RP-US Military Bases agreement was signed on March 14, 1947. It provided the US with 99 years lease to more than 20 base sites, covering some 250,000 hectares in 13 provinces.
In 1959 the bases area was reduced to 117,075 hectares
Pres. Marcos refused to compromise the nation’s sovereignty and territorial integrity in the negotiations for the Military bases agreement . Thus the Serrano-Bohlan Memorandum of lease agreement from 99 years 25 years (1966-1991)
In 1976 Pres. Marcos further reduced the bases area to 71,000 hectares