
Modern Era, United States, Infantry
The 103rd Infantry Regiment belongs to the Army's preserved modern regimental lineage pool. It represents the continuity of unit identity through mobilization, reorganization, and later institutional use.
As with many higher-numbered regiments, its record is best understood through the Army's lineage system rather than through a single continuous field history.
The 103rd Infantry remains part of the Army's historical record of depth, flexibility, and organizational memory.
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 103rd Infantry Regiment Battalions page.