Infantry timelines · Infantry numbers 1–200

13th Infantry Regiment

A century of division assignments

1916–2026 · Regimental service, battle groups, battalions and deployments.

13th Infantry Regiment unit graphic
13th Infantry Regiment
First division shown8th Infantry Division17 Dec 1917
Separate battalion histories2 documented elementsDated lineages and service notes below
Page cutoff8 September 2026Last-documented status is explicitly marked

One regiment, separate assignments

The common row follows the regiment. After its reorganization, battle groups and battalions could hold different assignments at the same time. A deployment or temporary attachment does not by itself change the assigned division. The common row closes on 1 Aug 1957; later service belongs to the separate element rows. Battalion rows follow headquarters lineages, often descended from lettered companies, rather than assuming that the old regimental battalions continued unchanged.

The February 1959 reassignment is known only to the month, so that month is marked uncertain. Early regimental assignments are recorded in the 1st Battalion lineage; its separate company inactivation in 1929 is not applied to the entire regiment.

Division patches

8th Infantry Division9th Infantry Division5th Infantry Division1st Infantry Division

Representative division patches. Patterns could change over time; an image does not imply that the exact version was worn throughout every period. Divisions without a verified asset remain identified by name.

The dated record

Division timeline

Battalion overview →

Deployments, operations and credited campaign service appear inside assignment cards. Award years establish credited service, not exact tour dates. Some service notes identify only company-sized elements. This is a sourced selection, not a complete movement log.

Assignment ends are exclusive: the next period starts on that date. *Striped final bars mean last documented, with later status unverified through the page cutoff. Unknown intervals are not treated as inactive.

  1. 1 Jan 1916 – 17 Dec 1917

    13th Infantry Regiment

    Assignment not established

    The available record does not establish a precise assignment throughout this interval. No division is inferred.

    Source

  2. 17 Dec 1917 – 24 Mar 1923

    13th Infantry Regiment

    8th Infantry Division

    Division names are normalized across historical redesignations. This entry follows the cited unit lineage.

    Source

  3. 24 Mar 1923 – 15 Aug 1927

    13th Infantry Regiment

    9th Infantry Division

    Division names are normalized across historical redesignations. This entry follows the cited unit lineage.

    Source

  4. 15 Aug 1927 – 1 Oct 1933

    13th Infantry Regiment

    5th Infantry Division

    Division names are normalized across historical redesignations. This entry follows the cited unit lineage.

    Source

  5. 1 Oct 1933 – 14 Jun 1940

    13th Infantry Regiment

    9th Infantry Division

    Division names are normalized across historical redesignations. This entry follows the cited unit lineage.

    Source

  6. 14 Jun 1940 – 14 Jul 1940

    13th Infantry Regiment

    Inactive

    The unit or its headquarters lineage was inactive. This status does not imply that every inherited honor or divisional affiliation was erased.

    Source

  7. 14 Jul 1940 – 18 Nov 1945

    13th Infantry Regiment

    8th Infantry Division

    Division names are normalized across historical redesignations. This entry follows the cited unit lineage.

    Source

    Deployments & overseas operations

    1. 1944-1945

      Normandy, Northern France, Rhineland and Central Europe

      13th Infantry Regiment · Campaign service

      Campaign participation is recorded in the Army lineage. The year label summarizes campaign service, not an exact overseas tour. The labeled service overlaps an assignment change and is listed only once; consult the following assignment cards as well.

      Source
  8. 18 Nov 1945 – 17 Aug 1950

    13th Infantry Regiment

    Inactive

    The unit or its headquarters lineage was inactive. This status does not imply that every inherited honor or divisional affiliation was erased.

    Source

  9. 17 Aug 1950 – 1 Aug 1957

    13th Infantry Regiment

    8th Infantry Division

    Division names are normalized across historical redesignations. This entry follows the cited unit lineage.

    Source

  10. 1 Aug 1957 – 1 Feb 1959

    1st Battle Group / Battalion lineage

    8th Infantry Division

    Division names are normalized across historical redesignations. This entry follows the cited unit lineage.

    Source

  11. 1 Feb 1959 – 1 Mar 1959

    1st Battle Group / Battalion lineage

    Assignment not established

    The available record does not establish a precise assignment throughout this interval. No division is inferred.

    Source

  12. 1 Mar 1959 – 25 Apr 1963

    1st Battle Group / Battalion lineage

    1st Infantry Division

    Division names are normalized across historical redesignations. This entry follows the cited unit lineage.

    Source

  13. 25 Apr 1963 – 16 Jun 1989

    1st Battle Group / Battalion lineage

    8th Infantry Division

    Division names are normalized across historical redesignations. This entry follows the cited unit lineage.

    Source

  14. 16 Jun 1989 – 16 Nov 2005

    1st Battle Group / Battalion lineage

    Inactive

    The unit or its headquarters lineage was inactive. This status does not imply that every inherited honor or divisional affiliation was erased.

    Source

  15. 16 Nov 2005 – page cutoff*

    1st Battle Group / Battalion lineage

    Last documented: TRADOC · Training

    Institutional or training service. This is a command relationship, not a maneuver-division assignment. The source establishes this last recorded status, not uninterrupted service through 2026. The striped bar extends to the page cutoff to keep the later research gap visible.

    Source

Service note · dates incomplete

2d Battalion · Basic Combat Training

Fort Jackson identifies the battalion as a Basic Combat Training unit under the 193d Infantry Brigade. Exact boundaries between its earlier divisional service and training role remain incomplete here.

Source

Sources and scope

Army Center of Military History lineage certificates provide the dated backbone. Regimental associations and secondary histories supplement individual operations and battalions. Where the evidence stops, the page says so. A page cutoff is not a claim that every unit directory was current on that date.

Earlier battalions are covered by common regimental service; separately dated lineages and substantiated later battalions receive their own rows or notes. A unit graphic alone is not evidence of a battalion assignment. Reserve, training and inactive organizations are distinguished from active combat units.

  1. U.S. Army Center of Military History: 1st Battalion 13th Infantry Regiment
  2. Fort Jackson: 2d Battalion, 13th Infantry training mission
  3. 13th Infantry Regiment history (Wikipedia; secondary)

Patch artwork

Unmodified artwork from Wikimedia Commons; individual file pages identify the artist and license. Insignia represent the divisions, not regimental affiliation badges.