Guam Forts

American Forts: West

GUAM

Last Update: 12/APRIL/2008

Tarague
(Anderson Air Force Base)
(1944), Tarague Beach
A Japanese gun emplacement or pillbox is on the shore here. Located at the east-end of the Tarague Beach picnic area. Public access restricted.

Anderson Air Force Base
(1944 - present), near Yigo
The U.S. Army Air Force built North Field and Northwest Field in late 1944, operational in 1945. The lighthouse at Ritidian Point was built in 1932. Public access restricted.

Yigo
(South Pacific Memorial Park)
(1944), Yigo
A Japanese command bunker is located here at Mataguac Spring north of the village.

Tanguisson
(1944), near Harmon Village
Two Japanese gun emplacements are located on Tanguisson Beach. An uncompleted Japanese airfield is also nearby. A Japanese AA gun emplacement site is located at Hilaan Point.

Tumon Bay
(1944), Tumon
A 200mm Japanese coast defense gun is still emplaced in situ at Gun Beach. A concrete pillbox is also nearby. Numerous other bunkers, pillboxes, and other structures exist along the beach from Gognga Point to Ypao Point. A gun emplacement is next to the Pacific Star Hotel. Japanese 120mm dual-purpose guns are preserved at the Guam Hilton Hotel and the Fujita Guam Tumon Beach Hotel.

Harmon Field
(Harmon Industrial Park)
(1944 - unknown), Tumon
The U.S. Army Air Force built the field for bombers. The former base is now an industrial park. Two Japanese 120mm dual-purpose guns are on display in front of the Black Construction Company.

Tamuning
(1944), Tamuning
Two Japanese 200mm coast defense guns are on display at the Onward Agana Beach Hotel, formerly emplaced near caves that were destroyed when the hotel was built.

Brewer Field
(Guam International Airport)
(1944 - 1990's), Tiyan
Formerly the Agana Naval Air Station unilt closed in the 1990's. Originally built by the Japanese in 1944. Used by U.S. Marine fighter planes in 1945.

Hagatna
(1944), Hagatna (Agana)
A Japanese gun emplacement is located near the Hagatna Marina and the Guam Fisherman's Co-op. A Japanese pillbox is located near the Hagatna U.S. Naval Cemetery in East Hagatna. Two Japanese mobile 47mm anti-tank guns are located in front of the Guam Police Department. Numerous caves in the cliff face below Hagatna Heights were dug by Chamorro forced labor.

Plaza de España
(early 1800's - 1944), Hagatna (Agana)
The colonial Spanish administative area, later the U.S. Navy headquarters and Japanese miltary headquarters. The original palace was destroyed in 1944. The Guam Insular Guard made their last stand here before the American surrender to the Japanese on December 10, 1941.

Fort Santa Agueda
(early 1800's, 1944), Hagatna Heights
Also known as Fort Apugan. This is the only surviving Spanish fort in the city. Used by the Japanese as an AA battery. Located on Route 7 next to the Government House and Latte Stone Park.

Adelup
(Adelup Park)
(1944), Adelup
Japanese gun emplacements still exist on Adelup Point.

Asan Beach Unit
(War in the Pacific National Historical Park)
(1944), Asan
Japanese gun emplacements and/or pillboxes are located on Asan Beach, Asan Point, and near Adelup Point, as well as at inland locations. A battery for 200mm coast defense guns is located on the west-side of the Asan Point ridge. A 75mm mountain gun is located in the inland unit of the park. Camp Asan (1944) was established by the Americans for Chamorro refugees after the start of the invasion.

Piti Navy Yard Defenses
(1899 - 1944), Piti
Established by the U.S. Navy after the Spanish-American War. The base was largely still intact when captured by the Japanese in December 1941. The two 3-inch guns on the U.S.S. Penguin (AM-33) were the only large-caliber guns available for island defense, and were soon knocked out by the Japanese, the ship being scuttled off of Orote Point. There were no anti-aircraft batteries set up here, save the two .50-cal. AA MG on the Penguin. The only other American vessels present were two yard patrol craft (YP-16 and YP-17), both destroyed, and the oil depot ship U.S.S. Robert L. Barnes (AG-27), captured. The base's station ship U.S.S. Gold Star (AG-12) was away in the Philippines at the time of attack. The base was completely destroyed by American forces in 1944. The old dock and marine railway still exist, now part of Cabras Lagoon Marina.

Piti Unit
(War in the Pacific National Historical Park)
(1944), Piti
Three Japanese 140mm guns in excellent condition are still located in the hills above the village. They defended the Navy Yard during the Japanese occupation.

Outside of the national park, near the north-side of the mouth of the Sasa River in a dense bamboo grove is a Japanese battery of 60mm guns.

Mt. Chachao
(War in the Pacific National Historical Park)
(1944), near Atantano
Remnants of Japanese tunnels and a lookout post are here, as well as an American Bomber Command VHF station (1945).

Mt. Tenjo Battery
(War in the Pacific National Historical Park)
(1909 - 1920's), near Atantano
An American two-gun 6-inch naval gun emplacement and command post is still located here, overlooking the Piti Navy Yard and Apra Harbor. Manned by the Marines during WWI. Guam's obsolete defenses were removed before 1930, per the 1922 Naval Treaty of Washington, but were slated for replacement in 1939. They never were, and the island remained practically defenseless in 1941. Access is by hiking trail south from from Mount Chachao.

Fort Santa Cruz
(1898), Ladrone Islands
A colonial Spanish fort located on a reef in Apra Harbor, off of Sumay. It was easily captured by an American landing party. The small Spanish garrison did not know war had been declared, resulting in a battle that lasted only 5 minutes. All Spanish citizens were taken to Manila, Philippines. The fort still existed during WWII.

Fort San Luis
(unknown dates), near Sumay
A colonial Spanish fort in ruins in 1898. Site located at San Luis Point.

U.S. Marine Barracks
(Marianas Military Museum)
(1901 - 1941), Sumay
Also known as Sumay Barracks. Completely destroyed after the Japanese captured the island in 1941. The 153-man Marine garrison was equipped only with several .30-cal. AA machine guns and their own personal weapons to defend themselves. The original barracks plaque is on display at the Marianas Military Museum located here. Also on display here are a Japanese 200mm coast defense gun, two Japanese 47mm anti-tank guns, two Japanese 75mm AA guns, two American 155mm Long Tom guns, and two American 3-inch saluting guns.

The Pacific Cable Company established a cable station nearby in 1903 (ruins exist). A Japanese 25mm dual-mount AA gun is located east of the cable station site. Pan-American Airways established a seaplane base here in 1936. Remnants of the seaplane ramp exist, but the Pan-Am Hotel is long gone. The World War Two Memorial Park is located at the old village of Sumay, with two 40mm saluting guns on display. Japanese caves are in the nearby cliffs. The Naval Operating Base was re-established at Apra Harbor in 1945. Many 1945 and later structures still exist. Two American 155mm Long Tom guns are on display at the Naval Ship Repair Facility administrative building.

Orote Peninsula
(1944), Orote Point
Three Japanese gun emplacements are located on Gabgab Beach facing Outer Apra Harbor. The Japanese originally built Orote Field in 1943, operational in 1944. The U.S. Marines used the field for fighter planes in 1945. Three Japanese gun emplacements are located south along Dadi Beach, along with several caves in the cliff face. A Japanese Type C midget submarine is on display in the Lockwood Terrace housing, with two Japanese 25mm AA guns nearby.

Fort San Iago
(1898, 1944), Orote Point
A colonial Spanish fort. Also spelled San Yago. The Japanese had an AA battery here to protect Orote Field. A Japanese bunker is nearby.

Orote Point Battery
(1910's ?, 1944), Orote Point
An American WWI era gun emplacement is located at the western tip of Orote Point beyond old Fort San Iago. Japanese gun emplacements and a command bunker are also located nearby.

Agat Unit
(War in the Pacific National Historical Park)
(1944), Agat
Japanese bunkers, gun emplacements, and pillboxes are located at various beach locations. A Japanese 200mm coast defense gun still exists at Ga'an Point. A Japanese 25mm dual-mount AA gun is also located in the park unit. Bangi Island, south of Ga'an Point, has an extant emplacement built for a 200mm coast defense gun (gun removed). A Japanese tunnel system is at the base of Mt. Alifan behind the town. To the south at Nimitz Beach are several extant concrete mounts for American AA guns (1945). To the north at Apaca Point, just west of the Namo River bridge, was a Japanese fortified position. Camp Agat (1944) was established near Ga'an Point by the Americans for Chamorro refugees after the start of the invasion.

U.S. Naval Magazine
(Naval Ordnance Annex)
(1944 - present), Santa Rita
The U.S. Navy established the ordnance reservation in 1944, encompassing most of the Fena Valley watershed. Many original buildings, structures, and storage yards still exist. The Maanot Water Reservoir was built in 1931. A Japanese 200mm coast defense gun is on display near the Post HQ building. Within the reservation atop Mt. Alifan is the ruins of a postwar American naval communications station, although local legend has it as a Japanese lookout post. No public access.

Fort Santa Angel
(unknown dates), northern Umatac Bay
A colonial Spanish fort in ruins by 1850.

Fort San José
(unknown dates), northern Umatac Bay
A colonial Spanish fort in ruins by 1850.

Fort Soledad (park)
(early 1800's, 1944), southern Umatac Bay
A colonial Spanish fort. Fort Nuestra Señora de la Soledad, meaning "Our Lady of Solitude", did not survive the American bombardment in 1944. Preserved ruins still exist. The site was used by the Japanese. A gun emplacement is nearby.

Pigua
(1944), Pigua
A Japanese AA gun emplacement is just west of the village, in the hills behind the Merizo Cemetery.

Talona
(1944), Talona
A Japanese gun emplacement or pillbox is on the shore here.

Inarajan
(1944), Inarajan
A Japanese gun emplacement is on the southern shore of the bay entrance.

Talofofo
(1944), Talofofo area
A Japanese gun emplacement is located at Matala Point at the southern entrance to Talofofo Bay, and a gun emplacement is located at Adjoulan Point at the northern entrance to the bay. Another gun emplacement or pillbox is located on the southern shore of the mouth of the Togcha River near Tartuguan Point.

Camp Dealy
(1944 - 1945), Talofofo
A rest and rehabilitation camp for U.S. Navy Pacific Fleet submariners. No remains except guardpost foundation at entrance, and offshore dredged swimming holes at Jones Beach

Ylig
(1944), Ylig
A Japanese gun emplacement or pillbox is on the shore south of Ylig Point. A gun emplacement is near the Togcha Cemetery on the south-side of Ylig Point.

Camp Manengon
(1944), near Yona
The Japanese built a concentration camp for 10,000 native Guamanians (Chamorros) in the Manengon River valley west of the village. The guards abandoned the camp just prior to the American invasion.

Yona
(1944), Yona
A Japanese pillbox is located on the north-side of the mouth of the Pago River. A gun emplacement is located south of the river mouth. A lookout post is located on Pago Point.

Camp Asinan
(1944), near Yona
A Chamorro concentration camp on the Pago River north of the village.

NOTE: The Japanese emplaced several varieties of coastal defense guns in various locations, most in early 1944. There were approximately nineteen 200mm guns, eight 140mm guns, twenty-two 127mm guns, six 80mm guns, eight 75mm AA guns, twelve 25mm dual-mount AA guns, and other assorted weapons, although numbers vary widely in different sources. Japanese troop stragglers were discovered at various locations in 1951, 1960, and 1972.

In addition to the sites listed above, two Japanese 120mm dual-purpose guns are on display at the U.S. Naval Computer and Telecommunications Area Master Station (NCTAMS) administrative building in Dededo.

Another website on the War in the Pacific National Historical Park.

NOTE: Guam was claimed by Spain in 1531, colonized beginning in 1668, ruled as a crown colony by Spain 1736 - 1898, governed by the United States 1898 - 1941, occupied by Japan 1941 - 1944 (renamed Omiya Jima), recaptured by the U.S. 1944 - 1945, and restored to territorial status 1949 - present.