Wallace Air Station, located in Poro Point, Ilocos (formerly part of La Union province), Philippines. A former U.S. military base, it was where helicopters from the USN and the USAF conduct search-and-rescue operations within Philippine territorial waters. The site was not targeted on Doomsday for it lacked a significant tactical value. As such, surviving helicopter of the USAF parajumpers continued to operate here in conjunction with the Philippine Air Force until 1997 when the surviving Americans left for Australia. Following the signing of a mutual defense treaty with the ANZC in 2003 (the successor of the 1951 Mutual Defense Treaty), the Commonwealth Navy and Air Force have stationed units in this military installation.