Date:

Fort Drum – The Concrete Battleship

Fort Drum, nicknamed the “Concrete Battleship”, is a fortified island situated at the mouth of Manila Bay in the Philippines.

Previously known as El Fraile Island, the site was acquired by the United States after the Spanish–American War (1898), a conflict that saw the United States emerge as the dominant power in the Caribbean region and the acquisition of Puerto Rico, Guam, and the Philippines.

- Advertisement -

The American Board of Fortifications planned for El Fraile Island to be developed into a mine control and casemate station as part of the Harbor Defenses of Manila and Subic Bays. Along with Fort Drum, a defensive chain was devised that included Fort Mills (Corregidor), Fort Hughes (Caballo Island), Fort Frank (Carabao Island), and Fort Wint (Grande Island).

However, the War Department decided to level El Fraile Island and commissioned the U.S. Army Corps of Engineers to build a 20-foot thick steel-reinforced concrete deck armed with 12-inch and 14-inch guns mounted in twin armoured turrets named Marshall (after Brigadier General William Louis Marshall) and Wilson (after Brigadier General John Moulder Wilson). Secondary armament was provided by two pairs of 6-inch guns mounted in armoured casemates on either side of the main structure.

Fort Drum entered active service in 1914, garrisoned by approximately 240 officers and enlisted men. Although not intentional as the concrete construction followed the natural contours of El Fraile Island, from a distance the fort resembles a battleship, thus the nickname of “Concrete Battleship.”

Following the invasion of Luzon during WW2 by the Japanese Imperial Army, Fort Drum became the first American battery of seacoast artillery to open fire on the Japanese, fending off a Japanese-commandeered inter-island steamer.

- Advertisement -

After several air raids and sustained fire from Japanese 150mm howitzer batteries positioned on the mainland near Ternate, Fort Drum surrendered to Japanese forces following the Fall of Corregidor on the 6th May, 1942, but not before destroying the armoured turrets.

Following the US offensive to reclaim Manila in 1945, Fort Drum stood as the final Japanese stronghold in Manila Bay. After intense aerial and naval bombardment by US forces, a modified Landing Ship Medium (LSM) transported US troops consisting of members of the 2nd Battalion, 151st Infantry Regiment, 38th Infantry Division, and a detachment of the 113th Combat Engineer Battalion, who quickly gained control of the fort’s upper deck.

The detonation of Fort Drum by US forces using gasoline, TNT & incendiary grenades – Public Domain

Rather than attempting to break into the battery, the combat engineers pumped a gasoline mixture through air vents on the top deck, and used a timed fuse of TNT to detonate incendiary grenades inside the structure. The explosion forced open a 1-ton hatch to a height of 300 feet, and caused significant damage to sections of the fort’s reinforced concrete walls.

Due to the intense heat and ongoing internal fires, US troops had to wait 5 days before entering the internal structure, finding the charred remains of 62 Japanese soldiers in the boiler room, and 6 soldiers in the upper floors that died from suffocation.

Following the conclusion of WW2, Fort Drum was decommissioned and became abandoned. In 2001, it was repurposed by the Philippine Coast Guard who fitted an automated light on the top deck for safely guiding ships entering the South Channel of Manila Bay.

Header Image – Fort Drum – Image Credit : Paul Soutar

- Advertisement -
spot_img
Mark Milligan
Mark Milligan
Mark Milligan is multi-award-winning journalist and the Managing Editor at HeritageDaily. His background is in archaeology and computer science, having written over 8,000 articles across several online publications. Mark is a member of the Association of British Science Writers (ABSW), the World Federation of Science Journalists, and in 2023 was the recipient of the British Citizen Award for Education, the BCA Medal of Honour, and the UK Prime Minister's Points of Light Award.
spot_img
spot_img
spot_img

Mobile Application

spot_img

Related Articles

Macabre book discovery at Suffolk Museum

A macabre book bound in human skin has been rediscovered at Moyse's Hall Museum in Bury St Edmunds, Suffolk.

Homeowner discovers hidden tunnel beneath townhouse

A homeowner unexpectedly discovered a hidden tunnel during renovations of their townhouse in Tielt, Belgium.

Armed in death: swords reveal warrior graves

Archaeologists from the National Institute for Preventive Archaeological Research (INRAP) have uncovered a necropolis with burials accompanied by richly adorned grave goods.

4,000 fragments of Roman wall paintings unearthed in Villajoyosa

Archaeologists excavating the Roman villa of Barberes Sud in Villajoyosa, Spain, have unearthed over 4,000 fragments of ornamental wall paintings.

Archaeologists solve the mystery of the “Deserted Castle”

Along the shores of a Danube tributary near Stopfenreuth are a section of ruined walls known locally as the “Deserted Castle”.

Ancient lecture hall discovered at Agrigento

An international team of archaeologists, led by Prof. Dr. Monika Trümper and Dr. Thomas Lappi from the Free University of Berlin have discovered an ancient lecture hall during excavations at Agrigento.

Ancient Greek theatre discovered on Lefkada

Archaeologists have discovered an Ancient Greek theatre during a long-term study on the island of Lefkada, located in the Ionian Sea on the west coast of Greece.

Dacian treasure hoard discovered by detectorists

A pair of detectorists conducting a survey near the town of Breaza have discovered a major treasure hoard associated with the Dacian people.