Corregidor (, , , ) is an island located at the entrance of Manila Bay in the southwestern part of Luzon in the Philippines, and is considered part of Cavite City in the province of Cavite despite being closer to Maragondon and Bataan. It is west of Manila, the nation's capital city and one of its most important seaports for centuries since the Spanish colonial period. Due to its strategic location, Corregidor has historically been fortified with coastal artillery batteries to defend the entrance of Manila Bay and Manila itself from attacks by enemy warships.

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 colonial period. 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 the Imperial Japanese Army. The island was heavily bombarded during the later part of the war, and the ruins serve as a military memorial to the American, Filipino, and Japanese soldiers who died. Corregidor is a major historical site, and one of the busiest tourist attractions in the Philippines.

Geography

Despite being located nearer to the southern coast of Bataan, Corregidor and the other fortified islands of Manila Bay fall under the jurisdiction of the City of Cavite."About Cavite City". Cavite City Library. Retrieved on June 7, 2012.Office of the Judge Advocate General, United States Army (1916). "United States Military Reservations, National Cemeteries and Military Parks", pp. 343–344. Government Printing Office, Washington. Corregidor, also known as "The Rock" for its rocky landscape and the heavy fortifications, along with Caballo Island, about south, divide the entrance of Manila Bay into the North and South Channel.

The tadpole-shaped island, with its tail running eastward, is about long, about wide at its widest with a total land area of about . The highest elevation is at on the Topside.U.S. Coast and Geodetic Survey (1919). "United States Coast Pilot, Part 1", pg. 72. Government Printing Office, Washington. The island is divided into four sections:

Topside The island's largest area, which points towards the South China Sea, rises prominently to a large flat area that is called "Topside". Beneath this was the fortified communications center of the island, as well as the location for the Army headquarters, barracks for enlisted men, a branch of the Philippine Trust Co. bank, the Cine Corregidor movie theater, officers' quarters, underground ordnance shops, the parade ground, an Officers' Club with a 9-hole Golf Course, tennis courts, and swimming pool, and the bulk of the artillery batteries that constituted the strength of Corregidor.

Middleside Middleside is a small plateau that interrupts the upward slope from Bottomside to Topside, and was the location of 2-story officers' quarters, barracks for the enlisted men, a hospital, quarters for non-commissioned officers, a service club, PX, and two schoolhouses—one for the children of Filipino soldiers and the other for American children.

Bottomside

Bottomside is the lower part of the island and is the neck that connects the tail and head of the island. South of Bottomside was Barangay or Barrio San José (near what was Navy Beach); on the north is what was Army Dock, with its three large piers, and, east of Bottomside, is the Malinta Tunnel. The Malinta Hill separates Bottomside from the Tail End."Malinta Tunnel". Corregidor Island Web Site. Retrieved on March 9, 2011.

Tailside The Tailside or Tail End is the remaining portion of the island where different memorials, shrines and the island's airstrip are located. Kindley Field was constructed in the early 1920s and named in honor of an early hero of the U.S. Army Air Corps. The airfield was operated then by the army, and the navy had a seaplane base. The short runway, cramped and hilly terrain had limited its use.Hubbard, Charles M. and Davis Jr., Collis H.. "Corregidor in Peace and War", p.82. University of Missouri Press, Columbia and London, 2006. .Linn, Brian McAllister. "Guardians of Empire: The U.S. Army and the Pacific, 1902–1940", p.203. University of North Carolina, Chapel Hill, 1997. .

In 1968 during the first term of Ferdinand Marcos, Tailside became the site of the Jabidah massacre, an event which angered the Philippines Muslim minority enough to trigger the Moro conflict, eventually leading to the creation of the Bangsamoro Autonomous Region in Muslim Mindanao (BARMM).

Geology 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 (PHIVOLCS) still classifies Corregidor as a potentially active volcano."Corregidor". Philippine Institute of Volcanology and Seismology. Retrieved on April 8, 2013.

History Pre-colonial era In the 13th century, local fishing villages dotted the island, then it became a hub for Chinese pirates and later by the Muslim Moros.

Spanish colonial era The island came under Spanish sovereignty on May 19, 1570, when Miguel Lopez de Legazpi and his forces arrived in Manila Bay. Legazpi was authorized by the Spanish Crown to establish the capital of the Philippines in Manila, and to convert the Muslims in Luzon and Mindanao to Christianity. Corregidor was used as a support site for the nine Spanish galleons used during the campaign.

Under Spanish rule, Corregidor served not only as a fortress of defense, a penal institution, and a station for customs inspection, but also as a signal outpost to warn Manila of the approach of hostile ships.

The name "Corregidor" comes from the Spanish word corregir, meaning "to correct". Isla del Corregidor, the old name of the place, literally means "the Corregidor's island".

Several explanations for how the island was named have been suggested. One story states that the island was called Isla del Corregidor (literally, Island of the Corrector) due to the Spanish customs system, wherein all ships entering Manila Bay were required to stop and have their documents checked and "corrected". Another version claims that the island was used as a penitentiary or correctional institution by the Spanish government, and thus came to be called El Corregidor.History, Corregidor Island.com. Corregidor is also a specific position of authority within the former Spanish administrative structure, the title for the man who was the head of a territorial unit known as un corregimiento. The institution of administrative districts called corregimientos (with each district chief known as El Corregidor) was in use throughout Spanish America and the Philippines. For example, the Philippines had "corregidores" in charge of Bataan and Zambales, among others.Felipe M. de Govantes. Compendio de la Historia de Filipinas. Manila, 1877, p.294 (in Spanish).

On November 23, 1574, the Chinese pirate Limahong and his 65-vessel fleet with 3,000 men anchored between Corregidor and Mariveles. From that site, he launched two successive attacks against Manila, commanded either by Limahong himself or by the Japanese pirate Sioco. Both attacks failed due to a fierce battle defense led by the governor, Juan de Salcedo.

In November and December 1600, during the Eighty Years' War between the Netherlands and Spain, the Dutch privateer and Admiral Olivier van Noort used the surroundings of Corregidor Island as an anchorage for his last two ships, Mauritius and Eendracht. From there he engaged in activities that the Spanish considered to be piracy, targeting ships on the sailing route to and from Manila. This situation ended after the naval combat of Fortune Island on December 14, 1600. The Spanish lost their flagship, the hastily converted Manila galleon San Diego, as the unbalanced weight of her extra cannon caused a permanent list and put her gun ports below the waterline. But they captured the Dutch ship Eendracht, and Admiral van Noort retreated from the Philippines. Continuing the three-year voyage in his one remaining ship and arriving home with 45 men still alive, van Noort became the first Dutch sea captain to circumnavigate the world.Quanchi, Historical Dictionary of the Discovery and Exploration of the Pacific Islands, page 246 The Dutch East India Company was formed a few months later.

In response to these events, and also to prevent sudden attack by Muslims from Mindanao, a watch vessel was posted at Corregidor to control the entrance to the bay. According to data from 1637, this vessel had a crew of twenty men, who were paid 540 pesos a year for this task.

Corregidor Island was taken over by the Dutch in June 1647, and from there they launched an offensive against Cavite which was repelled by the Spanish garrison under the command of Andre Lopez de Azalduigui. The Dutch would remain on the island for seven more months, however, as it served them well as an operations base from which to intercept Chinese merchant traffic in the vicinity of Luzon and Cebu. Finally they withdrew with few of their expectations fulfilled.

In October 1762, during the British invasion of Manila and Cavite led by Samuel Cornish and William Draper, Corregidor was used as an anchorage for warships, particularly HMS Panther and HMS Argo. It was also used as an anchorage for the fully loaded Spanish treasure galleon Santisima Trinidad they had captured, during November 1762. The British sailed the captured galleon to Portsmouth, England, where it was sold for a fortune.

The arrival of the Spanish fleet led by General Ignacio Mario de Alava, with the mission to place the Philippine Islands on alert, did not affect the fortunes of Corregidor Island. He limited his activity to the setting up of a naval station at Cavite.

On January 18, 1853, the Corregidor Island Lighthouse was first lit on the highest part of the island, to mark the entrance of Manila Bay for vessels coming in from the South China Sea. The Spanish government built this Second-Order light, which is situated above sea level and visible for ."El Archipielago Filipino", pp.525–527. Washington: Impriento del Gobierno, 1900.

Spanish–American War Corregidor Island was included in the Philippines' defense plan prepared in 1885 by General Cerero, but no action was taken to implement it. When the U.S. Navy's attack was thought to be imminent, a 12 cm gun of the "Hontoria System", which came from the Spanish Navy's cruiser Antonio de Ulloa, and two shorter 12 cm guns of the same caliber from the Spanish gunboat General Lezo, were installed on the rocky island of El Fraile. On Caballo Island, south of Corregidor, the Spanish army installed three 15 cm naval guns from the Spanish navy cruiser Velasco, which was undergoing repairs.Philippine forts at American Forts Network

At midnight on the night of April 30 to May 1, 1898, U.S. Navy Commodore George Dewey led his naval squadron, with his flag hoisted on board the protected cruiser , eastward along the southern coast of Corregidor Island, beyond the reach of Spanish batteries and with no navigational lights on, preparing to fight the Battle of Manila Bay.

At a distance about one mile off El Fraile, Dewey's fleet changed course to the northeast, steaming towards Manila. When they were discovered, the Spaniards fired from El Fraile's artillery. An American response followed immediately, first by and then by , and . Since the flotilla's speed was ten knots, they were soon far away from the Spanish batteries. Dewey sailed for Cavite where he destroyed the naval forces of Admiral Montojo.