55th Infantry Regiment
Modern Era, United States, Infantry
The 55th Infantry Regiment belongs to the Army's higher-numbered infantry lineages of the modern era, representing the service's capacity to expand beyond the older core of regular regiments. Its history is bound up with reorganization, reserve depth, and institutional continuity.
Like many regiments in this range, it is better understood through the Army's lineage system than through one uninterrupted combat narrative. Its existence reflects how the Army prepared for large-scale conflict and maintained naming continuity after those emergencies passed.
The regiment remains part of the broader historical record of Army expansion, modernization, and selective retention of unit identities.
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 55th Infantry Regiment Battalions page.