About this Unit
MCB-40, known as Mobile Construction Battalion Forty or the "Fighting Forty," was a United States Navy Seabee unit established in 1952. The battalion played a crucial role during the Vietnam War, constructing airfields, roads, and support facilities for U.S. and allied forces throughout Southeast Asia. Over the decades, MCB-40 also supported numerous peacetime construction and disaster relief missions in the Pacific and elsewhere, showcasing Seabee versatility. The unit was decommissioned in 1994 as part of post–Cold War military restructuring, leaving a legacy of engineering excellence and service.
Historical Facts
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Formation and Name: Mobile Construction Battalion 40 (MCB-40), also known as the "Seabees," was commissioned on March 1, 1942, during World War II as part of the U.S. Navy's effort to rapidly build infrastructure in combat zones.
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World War II Deployments: MCB-40 served in the Pacific Theater, participating in major campaigns such as the construction of airfields, roads, and bases on islands like Okinawa and the Philippines, often under direct enemy fire.
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"Can Do" Spirit: The Seabees, including MCB-40, adopted the motto "Can Do," reflecting their reputation for accomplishing construction missions in challenging and dangerous environments.
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Pioneering Airfield Construction: MCB-40 was instrumental in building and repairing airstrips that allowed Allied forces to project air power across the Pacific, sometimes completing runways in just days after landings.
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Postwar Operations: After World War II, MCB-40 continued to serve in various global hotspots, including deployments during the Korean and Vietnam Wars, supporting U.S. military operations with critical construction and engineering capabilities.
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Disaster Relief: The unit also contributed to humanitarian missions, such as providing disaster relief after typhoons and earthquakes, showcasing their versatility beyond combat support.
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Vietnam War Service: MCB-40 played a significant role in Vietnam, constructing bases, airfields, and defensive positions, often working under threat from enemy forces and hostile environments.
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Innovative Engineering: The battalion was known for innovative solutions, such as creating expedient bridges and facilities using limited supplies, earning respect from both engineers and combat troops.
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Unit Awards: Over its history, MCB-40 has received multiple unit commendations and awards for outstanding service, including the Navy Unit Commendation and Meritorious Unit Commendation.
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Legacy and Decommissioning: MCB-40's traditions and accomplishments continue to inspire current Seabee units. The battalion was eventually decommissioned as part of post-Cold War force reductions, but its legacy remains an important part of Seabee and Navy history.
