What Is 155th Armored Brigade Combat Team

Overview

The 155th Armored Brigade Combat Team (ABCT) is a combat-ready formation within the U.S. Army National Guard, designed to project armored power in both conventional and expeditionary operations. Originally established in 2004, the unit has evolved through multiple reorganizations to meet modern battlefield demands and align with the U.S. Army’s modular force structure.

Based at Camp Shelby, Mississippi, the 155th ABCT serves as a critical component of the Mississippi Army National Guard and falls under the command of the 35th Infantry Division. Its mission includes rapid mobilization, joint training exercises, and overseas deployments in support of national defense objectives.

• Activation and lineage: The 155th was first activated in 2004 as a Heavy Brigade Combat Team, tracing its lineage to earlier Mississippi National Guard units dating back to World War I.
• Headquarters: The brigade operates from Camp Shelby, Mississippi, one of the largest National Guard training sites in the United States, covering over 134,000 acres.
• Reorganization: In 2016, the unit was redesignated as an Armored Brigade Combat Team under the 35th Infantry Division to enhance interoperability with active-duty armored formations.
• Personnel strength: The 155th ABCT fields approximately 4,700 soldiers, including tank crews, mechanized infantry, engineers, and combat support personnel.
• Deployment history: The brigade deployed to Iraq from 2005 to 2006, conducting security and counterinsurgency operations in Baghdad and Al-Anbar Province.

How It Works

The 155th ABCT functions as a self-contained armored maneuver unit, integrating armor, infantry, artillery, and combat support elements into a cohesive fighting force. Its structure enables rapid deployment and sustained operations in high-intensity combat environments.

• Command Structure: The brigade is led by a colonel and includes a Headquarters and Headquarters Company (HHC), three maneuver battalions, a field artillery battalion, and a brigade support battalion.
• Maneuver Elements: The brigade includes two armored battalions equipped with M1A2 SEPv3 Abrams tanks and one mechanized infantry battalion using M2A3 Bradley Fighting Vehicles.
• Fire Support: The 1st Battalion, 142nd Field Artillery Regiment operates M109A6 Paladin self-propelled howitzers, providing indirect fire support up to 30 kilometers.
• Reconnaissance: A cavalry squadron, typically the 1st Squadron, 155th Cavalry, conducts surveillance, target acquisition, and security missions using Humvees and MRAPs.
• Combat Support: Includes engineers from the 155th Brigade Engineer Battalion, capable of breaching obstacles, constructing fortifications, and conducting route clearance operations.
• Sustainment: The 155th Brigade Support Battalion ensures logistics readiness, managing fuel, ammunition, medical support, and maintenance for all subordinate units.

Key Comparison

This comparison highlights how the 155th ABCT aligns with standard ABCT doctrine while operating under the National Guard’s part-time mobilization model. Unlike active-duty brigades, the 155th balances civilian careers with military readiness, conducting monthly drills and annual training to maintain combat proficiency.

Key Facts

The 155th ABCT plays a pivotal role in national defense, combining National Guard flexibility with the firepower of a modern armored formation. Its deployments and training reflect its readiness for both domestic and international missions.

• 2004 activation: The unit was stood up in 2004 as part of the Army’s shift to modular, brigade-centric organizations, replacing older division-based structures.
• 2016 redesignation: Transitioned from a Heavy BCT to an Armored BCT to standardize equipment and tactics with active-duty armored units.
• 2022–2023 deployment: Deployed to Operation Inherent Resolve in Kuwait and Iraq, supporting advise-and-assist missions and regional deterrence.
• Training exercises: Participates in Warfighter Exercises and Joint Readiness Training Center (JRTC) rotations to validate combat readiness every three years.
• Equipment modernization: Received M1A2 SEPv3 Abrams tanks in 2020, featuring improved targeting systems, armor, and network connectivity.
• State mission: Can be activated by the Governor of Mississippi for disaster response, civil support, or homeland security under Title 32 status.

Why It Matters

The 155th Armored Brigade Combat Team exemplifies the evolving role of the National Guard in global military operations. Its ability to deploy overseas while maintaining domestic readiness underscores its strategic value to national defense policy.

• Force multiplier: Adds 4,700 trained soldiers to the total U.S. armored force, enhancing Army capacity without expanding active-duty end strength.
• Cost-effective readiness: Operates at a lower annual cost than active-duty brigades while maintaining high mobilization standards through structured training.
• Global responsiveness: Proven capability to deploy rapidly, as demonstrated by its 2022–2023 Middle East mission, contributing to coalition stability.
• Community integration: Soldiers maintain civilian careers, strengthening civil-military ties and promoting public understanding of national defense.
• Future readiness: Equipped with modern systems like the SEPv3 Abrams, the 155th is prepared for near-peer conflicts and hybrid warfare scenarios.

As geopolitical tensions rise, the 155th ABCT remains a vital asset, blending National Guard tradition with cutting-edge armored warfare capabilities to defend U.S. interests at home and abroad.