Fort Drum (Philippines)
El Fraile Island
|Part of Harbor Defenses of Manila and Subic Bays|
|Near Cavite City in Manila Bay in the Philippines|
|Height||Top deck is 40 ft (12 m) above water at mean low tide|
|Owner||Republic of the Philippines|
|Controlled by||Cavite City|
|Built by||United States Army Corps of Engineers|
|Events||World War II|
Fort Drum (also called El Fraile Island and nicknamed “The Concrete Battleship"), is a heavily fortified island situated at the mouth of Manila Bay in the Philippines, due south of Corregidor Island. The reinforced concrete sea fort, shaped like a battleship, was built by the United States in 1909 as one of the harbor defenses at the wider South Channel entrance to the Bay during the American colonial period.
It was unique among forts built by the United States between the American Civil War and early World War II, as it was a sea fort with turrets. It was captured and occupied by the Japanese during World War II, and was recaptured after U.S. forces ignited petroleum and gasoline in the fort, the conflagration killing 68 Japanese soldiers and leaving it permanently out of commission. It was five days before U.S. soldiers could enter the fortress because of the heat.
The now-abandoned fort was named after Brigadier General Richard C. Drum, who served with distinction during the Mexican–American War and the American Civil War, and died on October 15, 1909, the year of the fort's construction. The island and the other former harbor defenses of Manila Bay fall under the jurisdiction of the City of Cavite in Cavite Province.
Battle of Manila Bay
On the night of 30 April–1 May 1898, Commodore George Dewey's squadron entered Manila Bay, passing El Fraile, where three 120 mm guns were mounted: one Hontoria 12 cm gun from the Spanish cruiser Antonio de Ulloa, and two shorter 120 mm guns from the Spanish gunboat General Lezo.
The shore guns exchanged fire with USS McCulloch, which was briefly illuminated by a soot flare-up from her stacks, and soon also USS Boston, USS Raleigh and USS Concord opened fire. However, Dewey's ships passed the forts without significant damage, and fought the Battle of Manila Bay in the morning.
Planning and design
The Board of Fortifications chaired by William H. Taft recommended that key harbors of territories acquired by the United States after the Spanish–American War be fortified. Consequently, the rocky El Fraile Island was fortified and incorporated into the harbor defenses of Manila and Subic Bays.
Initially, Fort Drum was planned as a mine control and casemate station. However, due to inadequate defences in the area, a plan was devised to level the island, and then build a concrete structure on top of it armed with four 12-inch (305 mm) guns in twin mounts. This was submitted to the War Department, which decided to change the 12-inch (305 mm) guns to 14-inch (356 mm) guns mounted in twin armoured turrets.
The forward turret, with a traverse of 230°, was mounted on the forward portion of the upper deck, which was 9 ft (2.7 m) below the top deck; the rear turret, with a full 360° traverse, was mounted on the top deck. The guns of both turrets were capable of 15° elevation, giving them a range of 19,200 yards (17,600 m). Secondary armament was provided by two pairs of 6-inch (152 mm) guns mounted in armoured casemates on either side of the main structure. There were two 3-inch (76 mm) mobile AA guns on "spider" mounts for anti-aircraft defense, probably the 3-inch Gun M1918 and probably added circa 1918.
Overhead protection of the fort was provided by a 20-foot (6.1 m) thick steel-reinforced concrete deck. The exterior walls ranged between approximately 25 to 36 ft (7.6 to 11.0 m) thick, making it virtually impregnable to enemy naval attack.
Construction began in April 1909 and lasted for five years. The rocky island was levelled by U.S. Army Corps of Engineers and was built up with thick layers of steel-reinforced concrete into a massive structure roughly resembling a battleship, 350 ft (110 m) long, 144 ft (44 m) wide, and with a top deck 40 ft (12 m) above water at mean low tide. The 14-inch (356 mm) M1909 guns and their two custom built M1909 turrets, named Batteries Marshall and Wilson, were delivered and installed by 1916. The M1909 guns were specially designed for Fort Drum and were not deployed elsewhere. The secondary 6-inch (152 mm) M1908MII guns on M1910 pedestal mounts in casemates, Batteries Roberts and McCrea, were installed the same year.
Searchlights, anti-aircraft batteries, and a 60-foot (18 m) lattice-style fire control tower were mounted on the fort's upper surface. The living quarters for the approximately 240 officers and enlisted men, along with the power generators, plotting rooms and ammunition magazines, were located deep inside the fort.
Battery Marshall was named for Brigadier General William Louis Marshall, Civil War Medal of Honor recipient and Chief of Engineers 1908–1910. Battery Wilson was named for Brigadier General John Moulder Wilson, Civil War Medal of Honor recipient and Chief of Engineers 1897–1901. Battery Roberts was named for Benjamin K. Roberts, a cavalry, artillery, and coast artillery officer, who was made Chief of Artillery for one day in 1905 prior to his retirement. Battery McCrea was named for Tully McCrea, an artillery officer in the American Civil War.
World War II
Philippines campaign (1941–1942)
The successful invasion of Luzon by the Japanese Imperial Army in late December 1941 quickly brought land forces within range of Fort Drum and the other Manila Bay forts. Just before the outbreak of war in the Pacific Theatre on 7 December 1941, Fort Drum had been restaffed with men and officers of the 59th Coast Artillery Regiment (E Battery). The wooden barracks located on the fort's deck were dismantled to provide an unobstructed field of fire for Battery Wilson.
On 2 January 1942, Fort Drum withstood heavy Japanese air bombardment. On 12 January 1942, an M1903 3-inch (76 mm) seacoast gun with a pedestal mount was transferred from Fort Frank and installed at Fort Drum to help protect the fort's vulnerable "stern" section from attack, and it was named Battery Hoyle.
The very next day on 13 January, before the concrete emplacement was fully dry and the gun had been bore-sighted or checked for assurance level, it became the first American battery of seacoast artillery to open fire on the enemy in World War II when it drove off a Japanese-commandeered inter-island steamer, apparently bent on a close inspection of Fort Drum's vulnerable rear approach. Until that time, the cage mast control tower masked the fire of the rear main turret, while the height of the gun above water created a dead space, even had the field of fire been clear.
The first week of February 1942 saw the fort come under sustained fire from Japanese 150mm howitzer batteries positioned on the mainland near Ternate on the mainland. By the middle of March, the Japanese had moved heavy artillery into range, opening fire with 240mm siege howitzers, destroying Fort Drum's 3-inch antiaircraft battery, disabling one of the 6-inch guns, and damaging one of the armoured casemates. Sizeable portions of the Fort's concrete structure were chipped away by the shelling.
The armoured turrets were not damaged and remained in service throughout the bombardment. Counter-battery fire from Fort Drum's 14-inch guns and Fort Frank's 12-inch mortars was ineffective. With the collapse of American and Filipino resistance in Bataan on 10 April, only Fort Drum and the other harbour forts remained in American hands.
On the night of 5 May, the 14-inch batteries of Fort Drum opened fire on the second wave of the Japanese forces assaulting Corregidor, sinking several troop barges and inflicting heavy casualties. Fort Drum surrendered to Japanese forces after the Fall of Corregidor on 6 May 1942, and was occupied by them until 1945. The 6 metre (20-ft) thick reinforced concrete roof enabled Fort Drum to withstand concentrated and frequent pounding from the Japanese from about 15 February to 6 May 1942. No U.S. personnel in Fort Drum were killed during the siege and only five were injured.
The four 14-inch turret guns were never out of action and were still firing effectively five minutes before the Fall of Corregidor. As at the other forts in the Philippines, Fort Drum's garrison destroyed the guns before the Japanese occupied the fort, which is why one 14-inch gun has fallen back inside its turret. The surrender of the Manila Bay forts marked the end of U.S. resistance in the Philippines.
Philippines Campaign (1944–1945)
In 1945 following the offensive to recapture Manila, the heavily fortified island was the last position in the Bay held by the Japanese. A Landing Ship Medium (LSM) was modified with a bridge structure to allow troops to run directly from the ship to the top deck of the fort. After a heavy aerial and naval bombardment, U.S. troops gained access to the deck of the fort on 13 April and were able to confine the garrison below. Rather than attempting to break in, the troops and engineers adapted a method first used some days earlier in the assault of a mortar battery on Fort Hughes.
There, the troops pumped 2,500 US gallons (9,500 L) of two parts diesel fuel and one part gasoline through a vent shaft into the battery, and ignited it with white phosphorus mortar rounds, repeating this twice on subsequent days. Company F of the 2nd Battalion, 151st Infantry Regiment, 38th Infantry Division, part of the Fort Hughes attack, was chosen for the assault on Fort Drum along with a detachment of the 113th Combat Engineer Battalion.
At Fort Drum, a similar technique was employed, using air vents on the top deck, but a timed fuse was used rather than incendiary grenades. The resulting explosion ejected a 1-ton hatch 300 feet into the air. 68 Japanese soldiers were killed, and the fire burned for several days. It was five days before the fortress could be examined. With Fort Drum and the other Manila Bay forts neutralised, Japanese resistance in the Bay area ended.
The ruins of Fort Drum, including its disabled turrets and 14-inch (356 mm) guns, remain at the mouth of Manila Bay, abandoned since the end of World War II. In the 1970s, looters started removing scrap metal inside the fort for resale. This activity was ongoing according to a report in 2009.
An automated light, approximately 6 m (20 ft) on a hexagonal white concrete post with gallery was installed in 2001 by the Philippine Coast Guard on the top deck for guiding ships entering the South Channel of Manila Bay.
- Harbor Defenses of Manila and Subic Bays
- Seacoast defense in the United States
- United States Army Coast Artillery Corps
- Stone frigate
- Diamond Rock
- List of islands in the Greater Manila Area
- List of islands of the Philippines
- Manila Bay
- Hashima Island
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|Wikimedia Commons has media related to Fort Drum (El Fraile Island).|
- Harbor Defenses of Manila and Subic Bays at the Coast Defense Study Group
- Forts in the Philippines at American Forts Network
- Wainwright Report – Capt. Ben King's Report Post War
- Fort Drum: Concrete Battleship of the Philippines
- Fort Drum: Unsinkable Battleship in the Manila Bay, 1. part – Czech only
- Fort Drum and the Battle of Philippines, 2. part – Czech only