39th Infantry Regiment Battalions
Modern Era, United States, Infantry
This page collects the existing battalion illustrations and additional documented historical battalions of the 39th Infantry Regiment. The historical entries include inactive units and earlier designations; the regimental image identifies entries without a battalion-specific illustration.
1st Battalion, 39th Infantry Regiment
This entry now anchors the battalion page in the regiment's origin or defining early identity, giving the 1st Battalion slot a more specific historical frame than the first scaffold pass.
The 39th Infantry Regiment was organized during World War I and became one of the regiments shaped entirely by the twentieth-century Army. Its most important service came through divisional assignments rather than through a long independent regimental tradition.
2d Battalion, 39th Infantry Regiment
The 2d Battalion entry uses the regiment's middle or operational arc to give the page a clearer sense of how the parent unit developed over time.
The regiment and its battalions later appeared in World War II, Vietnam-era service, and the training and operational Army that followed. As with several other lineages in this number range, the regiment's history survives mainly through battalion descendants and unit tradition rather than through one uninterrupted regimental combat career.
3d Battalion, 39th Infantry Regiment
The 3d Battalion entry now carries the regiment into its later or enduring modern identity, tightening the page around the way the lineage is remembered in the modern Army.
The 39th Infantry reflects the Army's move into industrial-era warfare and then into the later modular force, where old regimental names remained important carriers of institutional memory.
4th Battalion, 39th Infantry Regiment
The 4th Battalion earned its 'Hardcore' nickname during service in Vietnam with the 9th Infantry Division.
It was activated at Fort Jackson in October 2017 as a basic training battalion in the 165th Infantry Brigade. U.S. Army, October 2017.
Research note: The added historical entries cite their sources individually. Regimental illustrations are labeled as such. An earlier battalion designation can continue through another battalion or a separate battery; these relationships are identified in the entries. The original three entries are retained; the additional entries do not treat regimental campaign credits as evidence that every battalion fought in those campaigns.
Division timeline, 1916–2026 · assignments, patches and deployments →