About this Unit
Naval Mobile Construction Battalion 133 (NMCB-133), known as the "Runnin’ Roos," was commissioned on August 17, 1943, during World War II. The battalion earned distinction for its construction and engineering support throughout the Pacific Theater, including pivotal roles in the Philippines and Okinawa campaigns. Post-war, NMCB-133 supported operations during the Korean and Vietnam Wars, providing critical infrastructure, airfield, and base construction. Today, the battalion continues to serve as a vital component of the U.S. Navy Seabees, deploying worldwide in support of both combat and humanitarian missions.
Historical Facts
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Establishment: Naval Mobile Construction Battalion 133 (NMCB-133), known as the "Runnin’ Roos," was commissioned on August 17, 1943, at Naval Construction Training Center, Camp Peary, Williamsburg, Virginia, during World War II.
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World War II Service: During WWII, NMCB-133 served in the Pacific Theater, contributing to critical base construction and repairs in locations such as Guadalcanal, Bougainville, and Okinawa.
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Korean War Deployments: The battalion was reactivated during the Korean War and deployed to support United Nations operations by building airfields, roads, and other essential infrastructure.
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Vietnam War Contributions: NMCB-133 deployed multiple times to Vietnam, constructing bases, airstrips, and defensive positions, often working under enemy fire.
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Humanitarian Missions: Beyond combat, NMCB-133 has a long tradition of humanitarian assistance, including disaster relief missions in Haiti after the 2010 earthquake and along the U.S. Gulf Coast following Hurricanes Katrina and Rita.
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Global Reach: The battalion has operated on six continents, participating in exercises and operations in locations such as Europe, Africa, the Middle East, and the Caribbean.
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Nickname Origin: The unit's nickname, "Runnin’ Roos," comes from its original WWII insignia featuring a kangaroo, symbolizing the battalion’s agility and ability to “hop” rapidly from one location to another.
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Post-9/11 Deployments: Since 2001, NMCB-133 has supported Operations Enduring Freedom and Iraqi Freedom, constructing forward operating bases, roads, bridges, and security facilities in Afghanistan, Iraq, and Kuwait.
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Seabee Motto: As a Seabee unit, NMCB-133 embodies the motto "We Build, We Fight," reflecting their dual role as both builders and combat-ready personnel.
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Awards and Recognition: The battalion has received numerous commendations, including the Presidential Unit Citation, Navy Unit Commendation, and the Battle “E” Efficiency Award for outstanding performance.
