4th FSB

The 4th Forward Support Battalion (4th FSB) was a key logistics unit within the U.S. Army, originally assigned to the 4th Infantry Division. Activated in the post-Vietnam era, the 4th FSB provided vital supply, maintenance, and medical support to brigade combat teams, ensuring operational readiness and sustainment during both training and combat deployments. During Operation Iraqi Freedom, the 4th FSB played a critical role in supporting maneuver units by enabling rapid logistics and battlefield sustainment operations. The unit was eventually reorganized and redesignated in line with Army modular transformation initiatives, continuing its legacy of support under a new structure.