CORREGIDOR ISLAND

Corregidor Island, locally called Isla ng Corregidor, is a lofty island located at the entrance of Manila Bay in southwestern part of Luzon Island in the Philippines. Due to this location, Corregidor was fortified with several coastal artillery and ammunition magazines to defend the entrance of Manila Bay and the City of Manila from attacks by enemy warships in the event of war. Located 48 kilometres (30 mi) inland, Manila has been the largest city and the most important seaport in the Philippines for centuries, from the colonial rule of Spain, the United States, and Japan and after the establishment of the Republic of the Philippines in 1946.


Corregidor (Fort Mills) is the largest of the islands that formed the harbor defenses of Manila Bay together with El Fraile Island (Fort Drum), Caballo Island (Fort Hughes) and Carabao Island (Fort Frank), which were all fortified during the American occupation of the country. The island was also the site of a small military airfield, as part of the defense.

During World War II, Corregidor played an important role during the invasion and liberation of the Philippines from Japanese forces. Heavily bombarded in the latter part of the war, the ruins left on the island serve as a military memorial to American, Filipino and Japanese soldiers who served or lost their lives on the island. Corregidor is one of the important historic and tourist sites in the country.

Corregidor and Caballo islands are remnants of a volcanic crater, the Corregidor Caldera, which was last active about one million years ago. However, the Philippine Institute of Volcanology and Seismology still classifies Corregidor as a potentially active volcano.

There were 65 miles (105 km) of paved roads and trails on the island and 19.5 miles (31.4 km) of electric railroad track. The latter were used largely to haul heavy equipment and ammunition from Bottomside to the different Batteries. The Corregidor High School was where children of both Filipino and American servicemen assigned on the island studied. The island also had an electric trolley system as public transport, a movie house (Cine Corregidor), a baseball field and a swimming pool. The business and social center of this community was found on Topside.


There were 23 batteries installed on Corregidor, consisting of 56 coastal guns and mortars. In addition, Corregidor had 13 anti-aircraft artillery batteries with 76 guns (28 3-inch and 48 .50-caliber) and 10 60-inch Sperry searchlights.

The longest-range coastal pieces were the two 12-inch (305 mm) guns of Batteries Hearn and Smith, with a horizontal range of 29,000 yards (27,000 m). Although capable of an all around traverse, these guns, due to their flat trajectories, were not effective for use against targets on Bataan.

During the siege, the island had ample armor-piercing ammunition but very little of the anti-personnel type, which then was of greatest demand for use against land targets on Bataan. In fact, most of the anti-personnel shells were only for the 12-inch mortars of Batteries Way and Geary.