109th Infantry Regiment
Modern Era, United States, Infantry
The 109th Infantry Regiment is one of the Army's preserved modern-era lineages, representing continuity of identity across periods of mobilization, reorganization, and force reduction. Its place in history lies in that larger system of organizational preservation.
As the Army shifted toward battalion- and brigade-based formations, the 109th Infantry's identity was maintained through lineage and honors rather than through constant regimental field service.
That continuity keeps the regiment within the Army's broader institutional heritage.
Battalion Page
A dedicated battalion subpage now collects the regiment's known battalion icons and short battalion sketches for the 1st, 2d, and 3d Battalions. Open the 109th Infantry Regiment Battalions page.