Unit Details

1st Combat Engineer Battalion (reinf.)

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On 24 February 1941, at Guantanamo Bay, Cuba, then known as 1st Engineer Battalion, the unit was activated with the formation of the Headquarters and Service Company (H&S). All companies of the battalion were activated by 15 December 1941, just eight days after Pearl Harbor was attacked.

In August 1942, the battalion landed on Guadalcanal with the 1st Marine Division. Facing severe shortages of engineer equipment, the battalion used captured Japanese bulldozers and trucks to help complete the airfield and the defenses along the Marine perimeter. Serving as infantry at night, the engineers were kept busy repairing damage from Japanese bomber attacks.

The 1st Engineer Battalion fought in four other World War II campaigns: Eastern New Guinea, New Britain, Peleliu, and Okinawa. Typical of the role the engineers played was an attack that "C" Company participated in on New Britain in 1944. Facing a well entrenched enemy in swampy terrain, the engineers spent a torturous day building a corduroy road under direct enemy fire. In late afternoon, tanks were brought forward to lead the attack, but were unable to negotiate a 12 foot stream bank directly in front of the Japanese positions. Called upon to breach the final obstacle, two engineers moved forward on an unarmored bulldozer. Both were quickly killed, but another young engineer leaped aboard and managed to clear the way. That evening, the attack succeeded.

Following World War II, the battalion served in China on occupation duty, and then relocated to Camp Pendleton in 1947.

 

KOREA

1st Combat Engineer Battalion deployed to Korea in 1950 and participated in the brilliant landing at Inch'ŏn. During that conflict, the engineers participated in ten campaigns, but were best known for helping to lead the famous "breakout" at the Chosin Reservoir.

 



On 1 May 1957, the battalion was redesignated as the 1st Pioneer Battalion. In October 1962, elements of the battalion took part in the Cuban missile crisis. On 1 May 1963, the battalion was redesignated as 1st Engineer Battalion.

 

1st Battalion

CO 

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XO

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S-1 Personnel

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S-2 Intelligence

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S-3 Plan sand Operations

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S-4 Logistics

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Headquarters and Headquarters Company

Headquarters and Headquarters Company

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A Company

A Company
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B Company

B Company 

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C Company

C Company

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D Weapons Company

D Weapons Company

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Medical Detachment

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Service Company

Service Company

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Unit Info