76th SEABEES of World War II

Units of the 5th Naval Construction Brigade

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5th Naval Construction Brigade Heraldic Logo
Reconstructed from WWII Blueprint

Units of


United States Navy

All Inclusive List - 1944 to 1945

As taken from the 5th Naval Construction Brigade War Diary




4th NCB

The Fourth was commissioned in Camp Bradford, Va., in May 1942 and shipped out of Bremerton, Wash. in June for Dutch Harbor, Alaska. The battalion was then divided Into three groups: 200 men were sent to Eider Point, 350 to Unalaska village and the remainder stationed at Fort Mears area, Amaknak Island. In August 1942, a detachment of 200 men was sent to Adak and Amchitka, In the Aleutians and remained there five months. In June 1943, the entire complement returned to Camp Parks for a 30-day leave. The second tour of duty for the Fourth began just before the New Year, 1944. They landed at Pearl Harbor and began work on Moanalua Seabee Camp. Six months later the Battalion - shipped out to Guam and worked on installations there until May 1945, when they sailed for Okinawa. They were still on that Island when Japan surrendered last August.


56th NCB

Formed at Norfolk Dec. 24, 1942, the 56th transferred to Camp Parks Feb. 27, 1943 and to Hueneme March 15. The Battalion shipped to Pearl Harbor April 2, and was assigned to duty at the Naval Air Station, Kaneohe, Oahu. Alter 14 months Hawaiian duty, the 56th went to Guam in August 1944, and remained there through the war's end.


59th NCB

Commissioned at Norfolk, Va., on Dec. 29, 1942, the 59th Battalion left Norfolk Feb. 28, 1943 and arrived at Hueneme on March 4. Leaving there March 21, the outfit sailed from San Francisco March 24 and arrived at Hilo, Hawaii, March 30. The Battalion operated at Kanuela, Hawaii, until April 20, 1944. Returning to Pearl Harbor the next day, the Battalion sailed for Guam in three echelons, leaving June 1, June 6 and June 18. The first echelon landed on Guam on July 27, with the remaining units landing on July 30, Aug. 2, 3, 10, 14 and 18. War's end found them still stationed on Guam.


76th NCB

Formed at Norfolk, Va., in Jan. 1943, the 76th received additional training at Gulfport, Miss., then moved on to Hueneme April 1, 1943. The Battalion shipped out of Hueneme April 5 went up to San Francisco, then headed for Pearl Harbor where It landed April 16. Half of the Battalion remained on Oahu, the rest shipped out to Palmyra. The entire Battalion regrouped on Oahu in Jar. 1944, and remained there on duty until June 18, when it shipped out for Guam The first advanced detachments went ashore Aug. 3; debarkation was completed Aug. 14, 1944. The 76th was still on duty on Guam at the time the war ended.


109th NCB

Formed at Camp Peary in July 1943, the 109th Battalion had duty at Camp Endicott and Camp Parks before arriving at Port Hueneme Oct 15, 1943. Embarking for overseas duty at Hueneme on Nov. 22. 1943 the Battalion arrived on Oahu on Dec. 1. Sailing from Oahu in two echelons, they arrived on Kwajalein Feb. 2 and 6. 1944. Embarking at Roi-Namur on July 2, 1944, the unit returned to Oahu, landing July 13. Sailing again in four echelons, the detachments landed on Guam Dec. 28. 29 and 30, 1944 and Jan. 12. 1945. The outfit was still operating at Guam when the war ended.




25th NCB

Activation on Sept. 13, 1942 at Norfolk launched the 25th Battalion on a long history spotlighted by nearly three years overseas duty. The outfit went to Hueneme, then to Camp Elliott at San Diego on Oct. 31. After 250 men were transferred to NCB Replacement Group, FMF-TC, the remainder of the 25th was attached to the Third Marine Division, FMF, and the unit designated as Third Battalion, 19th Marines, Third Marine Division. Remaining companies were renamed as Headquarters, G. H, and 1. On Jan. 1, 1943, Co. G and 1/5th of Headquarters transferred to Ninth Marines (Reinforced), Third Marine Division. Co. H. and 1/5th of Headquarters transferred to 21st Marines (Reinforced), Third Marine Division, on Jan. 25, Co. I, and 1/5th of Headquarters were attached to Headquarters, Amphibious Corps FMF, for administrative purposes on Feb. 15. The G and H detachments reached Auckland, New Zealand in Feb. 1943, and the Co. I detachment reached Auckland May 28 after a two months' stay at Pago Pago, Tutuila, American Samoa. In June, G. H and I were detached from the Marines and returned to Battalion administration The 25th, now composed of a headquarters and three construction companies, moved to Guadalcanal in three echelons, the last group arriving at the 'Canal on Aug. 1. It sent 386 men and 15 officers into the early Bougainville invasion, the group landing under enemy fire Nov. 1. From Nov. 6 to Nov. 28, an additional 317 men and six officers landed at Bougainville. The forward echelons returned to Guadalcanal by Jan. 7, 1944. The Battalion was re-designated as the 25th NCB on April 11 and released from administrative control of Third Marine Division: then it was attached to Third Amphibious Corps, FMF for administrative purposes and to the Third Marine Division for operational purposes. The forward echelon of 621 men and 23 officers Landed on Guam under enemy fire on July 21, and by Sept. 20, all personnel had moved to Guam. The 25th was released from the Marines and attached to the Fifth NC Brigade Aug. 17. At war's close, the 25th was still operating on that island.


38th NCB

Forming at Norfolk, Va., in November 1942, the 38th went to Seattle, by way of Hueneme. They shipped out Jan. 9. 1943, arriving at Kodiak, Alaska, five days later. After six month of duty at Kodiak, the Battalion divided into three sections, one going to Kiska, the other two to Adak. The Battalion regrouped at Adak Dec. 5. 1943, and the next April, left for the States, arriving at Camp Parks May 11. During July and August of that summer, the 38th sent out two detachments to the Elk Hills Naval Petroleum Reserve No. 1 In California. The second tour of duty for the Battalion began Nov. 23, 1944. Arriving in Pearl Harbor a week later, the 38th spent 13 days at Pearl, then shipped out to Tinian in two main sections, the last group arriving there Jan. 7. 1945. When the Japs surrendered, the 38th was still on duty at Its Marianas base. After the surrender, the Battalion was sent to Japan as a truck-operating unit, and split into four sections for duty at Hiroshima, Kabayana, Yokosuka and Omura.


53rd NCB

Alter activation at Norfolk Dec. 22, 1942, the 53rd NCB moved to Davisville, R. I., Dec. 28, and was divided into two sections Jan. 16. 1943. The Second Section left Davisville Feb. 7 with orders to join a section of the 17th NCB to form the 120th NCB. Exact movements of Second Section are unreported following departure from Davisville. On Feb. 12, one company and one fourth of Headquarters Company of the First Section moved to Hadnot Point, New River, N. C. for duty with the Fleet Marine Force. Another company, with Headquarters group, went to San Diego for duty with FMF The Hadnot Point detachment was transferred into Naval Construction Replacement Group, Camp Lejeune, New River, N. C., Feb. 15. The 53rd was assigned 13 officers and 541 men from the replacement group at Lejeune, and seven officers and 268 men from replacement groups at Camps Elliott and Pendleton, San Diego. The contingents joined at San Diego Feb. 26, and sailed for Noumea, New Caledonia, March 11, arriving March 25. The 53rd was designated as Naval Construction Battalion, First Marine Amphibious Corps, April 14. The Battalion switched operations to Guadalcanal Oct. 12, 1943, and from there sent one detachment to Vella Lavella and several groups to Bougainville in November and December. The Battalion regrouped at Guadalcanal in January 1944, and on May 12 was redesignated the 53rd NCB. In six echelons, the unit moved to Guam, participating in the invasion, and was on duty there when the war ended.


72nd NCB

The 72nd NCB was organized at Camp Peary in January 1943 then jumped to Hueneme via Davisville and Parks. Leaving San Francisco April 24, the Battalion arrived at Pearl Harbor May 4 and was assigned to duty at Barbers Pt., Iroquois Pt. and Ewa, on Oahu. The 71st left the Hawaiian Islands June 18, 1944, landing on Guam in early August. At the war's end the unit was still operating there. In September the Battalion was scheduled for movement to Nagasaki, Japan.


136th NCB

Commissioned at Camp Peary in September 1943, the 136th NCB was transferred to Endicott on Sept. 29. Moving to Quoddy Village, Me., on Nov. 13 the outfit was stationed there until April 15, 1944, when it was transferred to Port Hueneme. Shipping overseasm from Hueneme in June 1944, the unit was stationed at Pearl Harbor until Oct. 15. Sailing westward again, the Battalion landed at Guam in late November. War's end found the 136th located at Guam, but after the surrender one half the outfit was moved to Yokosuka. Japan.


2nd Separate Engineer Battalion (3rd Marine Div. USMC)




2nd NCB

 (Special)The Second Battalion was divided into the Fourth and Fifth detachment at time of commissioning In April. 1942, at Camp Allen. The Fourth detachment embarked at Norfolk and arrived at Upolu in the Samoan Islands, in May of 1942. One unit of the detachment was assigned to the Fifth Marine Defense Battalion on Funafuti, In April 1943. In July, the rest of the Fourth detachment moved to Tutuila, also in the Samoan group. The unit that was sent to Funafuti rejoined the Fourth detachment in January 1944. The second hail of the Second Battalion, known as the Fifth detachment embarked from San Diego, Calif. and arrived at Tutuila late in April. 1942. Two months later, this unit moved to Wallis Island, where they remained for a year, then rejoined the rest of the Second Battalion at Tutuila. The entire Battalion, with the exception of 116 men, arrived at Camp Parks on March 7, 1944. The rear echelon arrived in the States one month later for decommissioning.


13th NCB (Special) 

After brief training periods at Camp Peary, Gulfport and Hueneme, the first echelon of the 13th Special arrived at Pearl Harbor Nov. 27, 1943, and was joined by the second echelon on Jan. 2. 1944. The Battalion worked at Pearl for five months, and then shipped out to Guam. the first echelon leaving June 1, and the second, June 18. The two sections reached Guam July 27 and Aug. 10 respectively. The 13th was still stevedoring on Guam at the war's end.


16th NCB (Special)

After organizing and training at Peary, the 16th Special moved to Gulfport, Miss. Oct. 23, 1943. After further training the Battalion entrained for Hueneme Nov. 14. On Christmas Day It embarked from Hueneme and arrived at Pearl Harbor on New Year's Day, 1944. On Feb. 13, 125 men went on detached duty with task force to Eniwetok and returned one month later. On Aug. 8, the Battalion embarked for Guam where it remained till the war's end.


17th NCB (Special) (1st Section)

In quick succession after activation Sept. 19, 1943, the 17th Special jumped to Gulfport Nov. 15, to Hueneme Nov. 30, and overseas Dec. 16. The 17th landed at Banika in the Russell Islands Jan. 9, 1944, and went on its first push in March when 505 men and 20 officers took part with the Fourth Marine Division in the occupation of Emirau Island in the St. Matthias group. Remainder of the Battalion followed in April. It returned to the Russells Aug. 14, staging for the Palau Island invasion. The First Section of 500 men landed on White and Orange Beaches at Peleliu H-Hour plus two of D-Day Sept. 15, attached to the First Marine Division. The Battalion split into two sections in Feb. 1945, with Section Two going to Ulithi with Comseron Ten. The First Section remained at Peleliu, then divided, with half going to adjacent Angaur April 28. The First Section rejoined forces in June and moved to Guam for the duration of the war, with the Second Section transferring to Leyte, where it remained on duty until the end of the war. Comservpac, on May 18, 1945, desired to return the entire 17th Special from Peleliu, Angaur and Leyte, to Pearl Harbor, for staging, but plans were altered.


29th NCB (Special)

The 29th Special was formed at Camp Peary and arrived at Hueneme May 15. 1944 for further training. On Sept. 12 the Battalion departed from Hueneme and arrived at Guam Oct. 24, remaining till the war's end.




23rd NCB

Commissioned at Camp Allen on Sept. 4, 1942, the 23rd Battalion was moved at once to Davisville. R. I. On Oct. 17 the outfit arrived at Port Hueneme and was moved up to Seattle for embarkation Oct. 30. Sailing from Seattle Nov. 2, the Battalion arrived at NOB Kodiak Nov. 7. During November two detachments were sent from Kodiak to Cold Bay. On March 28, 1943, four officers and 223 men departed from Kodiak for Dutch Harbor, arriving April 2. On April 9, three officers and 108 men arrived at Atka and the following day a detachment of three officers and 118 men arrived at Adak. On April 25, 1943 more of the outfit arrived at Dutch Harbor from Kodiak. Detachments were sent from Dutch Harbor to Adak on April 26, May 1 and May 6. And a detachment was also sent to Attu on May 6. On May 12, B Company arrived at Dutch Harbor from Kodiak and was sent to Adak on June 3. From June 14 to 22, detachments were transferred from Adak to Attu. On June 17 D Company left Cold Bay for Attu, arriving on June 26, bringing the outfit all together again. After establishing a headquarters on Attu, the Battalion sailed for the States on Dec. 30, 1943, arriving at Seattle Jan. 12, 1944. The outfit was moved to Camp Parks for duty until June 20, 1944, when it was transferred to Port Hueneme. Beginning Its second overseas tour, the outfit left Port Hueneme July 19, 1944, arriving at Pearl Harbor July 26. On Oct. 16, the Battalion sailed west from Pearl and after stopping over 22 days at Eniwetok, arrived on Guam on Nov. 22, and was still there when the war ended.


41st NCB

Formed at Camp Allen, Norfolk, on Nov. 30. 1942, the 41st NCB transferred to Camp Peary to Gulfport to Hueneme, before sailing overseas from Seattle Jan. 24, 1943. After operating at Kodiak for slightly more than a year, the Battalion returned to Camp Parks in March 1944. For its second tour of duty, the 41st was divided into two sections of 542 men each. Leaving Camp Parks, the two groups reached Hueneme June 6, 1944. The first section left for Guam Sept. 12 and the second section departed Oct. 1, also for Guam. The two sections consolidated at Guam Nov. 10, with the Battalion remaining on duty there through the war's end.




854th Aviation Engineering Bn.

The 854th Engineer Battalion was constituted 14 December 1942 in the Army of the United States as the 854th Engineer Aviation Battalion. Service in Guam & Okinawa.  Activated 1 January 1943 at March Field, California. Inactivated 15 March 1946 on Okinawa.

1884th Aviation Engineering Bn.

1885th Aviation Engineering Bn.

1887th Aviation Engineering Bn.

1889th Aviation Engineering Bn.

1895th  Aviation Engineering Bn.

1899th Aviation Engineering Bn.



2751st Engineering Heavy Shop Co. 

3067th Engineering Dump Truck Co. 

741st Engineering Base Equipment Co.

1356th Engineering Dump Truck Co.

1386th Engineering Base Depot Co.

1769th Engineering Parts Platoon


Miscellaneous Units

CBMU 515

CBMU 515 reached Hueneme from Camp Peary Aug. 1, 1943, and arrived at Guadalcanal the latter part of November. In two echelons, 51.5 left for Kwajalein on May 31 and June 3, 1944. On June 12, the unit proceeded to the Marianas, where the outfit stood by as a reserve in the Saipan operation, but did not land. Arriving back at Eniwetok July 1, MU 515 again left for the Marianas and Landed at Guam July 21 with Marine assault troops. May 15, 1945 the MU was still located on Guam assigned to the 22nd Marine Regiment.


CBMU 517

CBMU 517 was formed at Camp Peary, and was transferred to Gulf port, Miss. Shipped overseas on Oct. 1, 1943, it arrived at Funafuti Dec. 30, 1943. On Oct. 1, 1944, the outfit arrived at Tillotson Cove, Russell Islands. Leaving the Russells on Oct. 21, it arrived at Leyte, P. I., Dec 22, and went on to Guiuan, Samar, via small craft Dec. 24. The outfit sailed from Samar on April 27, 1945, and arrived at Ulithi on May 3.


CBD 1010

Formed at Port Hueneme in July 1943, CBD 1010 sailed overseas from Hueneme Aug. 22, 1943, arriving at Tulagi in September. In August 1944 the unit was moved to Guam, where it operated until it was inactivated on Dec. 15, 1945, and the personnel was transferred to Camp Parks.


CBD 1046

This unit was formed in February 1944, at Davisville, R. L, as an electric generator detachment and shipped out of Norfolk, Va. May 6, 1944 for Espiritu Santo. After completion of the work at that location, CBD 1046 moved to Guam and was still there when the Japs quit.


CBD 1053

CBD 1053 shipped overseas from Port Hueneme June 6, 1944, and arrived at Los NegrosJuly 6. Leaving Los Negros Jan. 10, 1945, the unit arrived at Guam Jan. 15. On Feb. 2,1945, CBD 1055 was inactivated and the personnel attached to CBD 1053. On April 1,1945, the Detachment was split into Section One and Section Two.


CBD 1055

Section Two left GuamApril 3 and arrived at Samar April 7. On July 1, 1945, Section Two moved to Manican iIsland, in the Philippines and set up headquarters. War's end found Section One still operating at Guam and Section Two at Manicani. CBD 1055 was activated at Espiritu Santo on June 11, 1944. The detachment was transferred to Manus on Nov. 17 and then to Guam on Jan. 10. 1945. On Feb. 2, the unit was inactivated and consolidated with CBD 1053.


CBD 1059

CBD 1059 was formed at Camp Peary and arrived at Port Hueneme in April 1944. The unit shipped overseas Oct. 11, 1944 and landed at Guam on Nov. 8. The outfit's principal work at Guam was to operate a large tire repair and recapping shop. In September 1945, the detachment remained at Guam.


CBD 1070

CBD 1070 shipped overseas from Camp Parks Oct. 21, 1944, arriving at Guam for Detachment 1022 began May 17, 1945, when the unit left Camp Parks, arriving at Samar, June 11. At war's end the outfit was still on duty at Samar Nov. 23. The following Aug. 8, the unit was inactivated.


CBD 1072

Shipping overseas from Camp Parks Oct. 21, 1944, CBD 1072 arrived at Guam Nov. 23. The unit was inactivated Aug. 8, 1945.CBD 1059 Operated the ACEORP

(ACEORP) Automotive and Construction Repair Equipment Overhaul and Repair Plant

 Automotive and Construction Equipment Parts Depot (ACEPD)

Advanced Base Construction Depot - Depot # 91 (ABCD)


144th NCB

The 144th NCB was transferred from Davisville, R. I. to Port Hueneme on Jan. 24, 1945. Sailing overseas on Feb. 15, the Battalion arrived on Guam March 18. The unit was located there on V-J Day.


Pontoon Assembly Detachment (PAD)  #5

PAD Five left Port Hueneme Dec. l8, 1944, for San Francisco, whence it shipped out to Guam. It arrived Jan. 16, 1945, after stops at Pearl Harbor and the Marshall Islands. The war's end found PAD Five on Guam.


70th NCB

Formed at Davisville, R. I., the 70th NCB embarked from New York April 28, 1943, and reached Oran, North Africa May 27. The Battalion transferred to Arzew, Algeria, maintaining headquarters there while sending detachments to Bizerte, Oran, Nemours, Beni-Saf, Amel-Turck, Mostaganem, Tenes and Port-Aux-Poules. One officer and 15 men from D Company participated in the Salerno operation Sept. 9, 1943. One officer and 100 men were detached Nov. 26, 1943, to form CBMU 578. The 70th returned to Davisville Christmas Day, 1943. In March. April, and May 1944, one officer and 50 men were on temporary duty at Naval Air Station, Jacksonville, Fla., on airfield construction. The 70th was designated officially as a pontoon Battalion Aug. 23, 1944, and sailed for Pearl Harbor Oct. 21, arriving Oct. 27. An advance echelon left for Guam Nov. 6, followed by several detachments in December and January. Fifteen officers and 276 men left Jan. 18 from Oahu to participate in the Iwo Jima assault in February. The Battalion was at Okinawa and Te Shima and is headed for various destinations in Japan, Korea and China.



Formed at Camp Peary and trained at Endicott, the 128th NCB was inactivated at Camp Parks Jan. 31, 1944 and reactivated Sept. 20 at Camp Endicott. It then moved to Parks and shipped out to Pearl Harbor, arriving Dec. 2, 1944. Echelons began moving to apermanent pontoon-operating base at Guam in January 1945, and from Guam the outfit sent detachments on amphibious operations. In September, elements of the Battalion were in Japan.


Note: No specific history has been found for the following units:

2nd Seperate  Engineer Battalion (USMC)



1884th Aviation Engineering Bn.

1885th Aviation Engineering Bn.

1887th Aviation Engineering Bn.

1889th Aviation Engineering Bn.

1895th  Aviation Engineering Bn.

1899th Aviation Engineering Bn.



2751st Engineering Heavy Shop Co. 

3067th Engineering Dump Truck Co. 

741st Engineering Base Equipment Co.

1356th Engineering Dump Truck Co.

1386th Engineering Base Depot Co.

1769th Engineering Parts Platoon