The 205th Infantry Brigade is a historic unit of the United States Army Reserve, known for its training missions and contributions to various military operations.
Formation and History
The 205th Infantry Brigade was first organized in 1921 as part of the United States Army Reserve’s 103rd Division. Initially formed in Arizona and New Mexico, it has undergone several reorganizations and activations throughout its history. The brigade was active from 1921 to 1942, then again from 1963 to 1994, and was reactivated in 2006.

Operational Roles
The brigade primarily focuses on post-mobilization training for U.S. Army forces, ensuring combat readiness for units bound to support operations such as Operation Enduring Freedom and Operation Iraqi Freedom. It operates mainly out of Camp Atterbury, Indiana, and includes a mix of active, reserve, and National Guard soldiers.

Recent Developments
On November 10, 2015, the 205th Infantry Brigade cased its colors during a ceremony at Camp Atterbury, marking its deactivation and reorganization under the 157th Combined Arms Training Brigade. This event was part of the First Army’s Operation Bold Shift initiative. The brigade had been involved in various training exercises and missions prior to its deactivation, contributing significantly to the readiness of Army Reserve units.

The 205th Infantry Brigade has a rich history and has played a vital role in training and preparing U.S. Army forces for deployment. Its legacy continues through the training programs and support it has provided to various military operations over the years.