About this Unit
The 3rd Battalion, 335th Regiment (Training Support Battalion), commonly referred to as 3/335 TSBn, is a unit within the U.S. Army Reserve. Its primary mission is to provide Observer, Coach, and Trainer (OC/T) support to Reserve and National Guard units, ensuring their readiness for deployment. The battalion falls under the 181st Infantry Brigade, First Army Division West, and is headquartered at Fort McCoy, Wisconsin. With a lineage dating back to the 335th Infantry Regiment of World War I, 3/335 TSBn continues its legacy by enhancing the combat effectiveness of America’s reserve forces through rigorous training and evaluation.
Historical Facts
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Unit Designation: The 3rd Battalion, 335th Regiment (3/335th TSBn) is part of the 85th U.S. Army Reserve Support Command, primarily tasked with training and supporting Army Reserve and National Guard units.
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TSBn Meaning: "TSBn" stands for "Training Support Battalion," reflecting the unit’s mission in providing observer-controller/trainer (OC/T) support for mobilization and deployment exercises.
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World War I Roots: The 335th Regiment was originally constituted in the National Army in 1917 as part of America's mobilization for World War I, making its lineage over a century old.
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World War II Service: The 335th Regiment served as part of the 84th Infantry Division, "The Railsplitters," during WWII, participating in campaigns in Northern France, Rhineland, Ardennes-Alsace, and Central Europe.
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Modern Mission: Today, 3/335th TSBn focuses on pre-mobilization and post-mobilization training, helping prepare units for deployments through realistic, scenario-based field exercises.
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Fort McCoy Connection: The battalion regularly conducts training at Fort McCoy, Wisconsin, a major training center for Army Reserve and National Guard units in the Midwest.
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Integral Role in Operation Iraqi Freedom/Enduring Freedom: 3/335th TSBn instructors and OC/Ts have played key roles in preparing thousands of Soldiers for deployment to Iraq and Afghanistan since 2001.
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Distinctive Unit Insignia: The 335th Regiment’s insignia features a red shield with a white rail splitter, symbolizing its connection to the 84th Division and its nickname.
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Army Reserve Structure: As an Army Reserve unit, many members are "citizen soldiers," balancing civilian careers with military service and bringing diverse skills to their training mission.
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Community Engagement: Soldiers from 3/335th TSBn often participate in community outreach and veteran support events, strengthening bonds between the military and local communities.
