Infantry timelines · Infantry numbers 1–200

6th Infantry Regiment

A century of division assignments

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

6th Infantry Regiment unit graphic
6th Infantry Regiment
First division shown5th Infantry Division18 Nov 1917
Separate battalion histories6 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 20 Jul 1944; 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 armored regiment split into separate battalions in July 1944. The later 1st and 2d Battalion lineages both descend through companies of the 6th Armored Infantry Battalion; the 4th descends through the 11th. These are lineage rows, not claims that modern battalion headquarters existed in 1944. The August 1921 reassignment is known only to the month.

Division patches

5th Infantry Division6th Infantry Division1st Armored Division23d Infantry Division (Americal)3d Infantry Division102d 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 – 18 Nov 1917

    6th Infantry Regiment

    Assignment not established

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

    Source

  2. 18 Nov 1917 – 1 Aug 1921

    6th Infantry Regiment

    5th Infantry Division

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

    Source

    Deployments & overseas operations

    1. 1918

      France: St. Mihiel and Meuse-Argonne

      6th Infantry Regiment · Campaign service

      Campaign participation is recorded in the Army lineage. The year label summarizes campaign service, not an exact overseas tour.

      Source
  3. 1 Aug 1921 – 1 Sep 1921

    6th Infantry Regiment

    Assignment not established

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

    Source

  4. 1 Sep 1921 – 24 Mar 1923

    6th Infantry Regiment

    No assigned division

    The cited record establishes service outside an assigned division. Higher headquarters and temporary operational attachments could still direct the unit.

    Source

  5. 24 Mar 1923 – 16 Oct 1939

    6th Infantry Regiment

    6th Infantry Division

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

    Source

  6. 16 Oct 1939 – 15 Jul 1940

    6th Infantry Regiment

    No assigned division

    The cited record establishes service outside an assigned division. Higher headquarters and temporary operational attachments could still direct the unit.

    Source

  7. 15 Jul 1940 – 20 Jul 1944

    6th Infantry Regiment

    1st Armored Division

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

    Source

    Deployments & overseas operations

    1. 1942-1944

      North Africa and Italy

      6th 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. 20 Jul 1944 – 1 May 1946

    1st Battle Group / Battalion lineage

    1st Armored Division

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

    Source

  9. 1 May 1946 – 20 Sep 1947

    1st Battle Group / Battalion lineage

    1st Constabulary Regiment

    This headquarters is not a division. Temporary attachments in the service entries below are distinct from the formal assignment.

    Source

  10. 20 Sep 1947 – 16 Oct 1950

    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

  11. 16 Oct 1950 – 15 Feb 1957

    1st Battle Group / Battalion lineage

    No assigned division

    The cited record establishes service outside an assigned division. Higher headquarters and temporary operational attachments could still direct the unit.

    Source

  12. 15 Feb 1957 – 12 May 1967

    1st Battle Group / Battalion lineage

    1st Armored Division

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

    Source

  13. 12 May 1967 – 15 Feb 1969

    1st Battle Group / Battalion lineage

    198th Infantry Brigade · Separate

    This headquarters is not a division. Temporary attachments in the service entries below are distinct from the formal assignment.

    Source

  14. 15 Feb 1969 – 13 Sep 1972

    1st Battle Group / Battalion lineage

    23d Infantry Division (Americal)

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

    Source

    Deployments & overseas operations

    1. 1969-1971

      Vietnam

      1st Battle Group / Battalion lineage · Credited overseas service

      The Army lineage lists a unit decoration for service in these years. These are credited service years, not exact deployment and return dates. More than one assignment falls in the opening year; this year-level service marker does not establish the assignment on a particular deployment day.

      Source
  15. 13 Sep 1972 – 17 Jan 1992

    1st Battle Group / Battalion lineage

    1st Armored Division

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

    Source

  16. 17 Jan 1992 – 15 Feb 1996

    1st Battle Group / Battalion lineage

    3d Infantry Division

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

    Source

    Deployments & overseas operations

    1. 1994

      Macedonia

      1st Battle Group / Battalion lineage · Deployment / overseas operation

      Deployed for Operation Able Sentry in January.

      Source
  17. 15 Feb 1996 – 16 Feb 1997

    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

  18. 16 Feb 1997 – 16 Sep 2010

    1st Battle Group / Battalion lineage

    1st Armored Division

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

    Source

    Deployments & overseas operations

    1. 2005-2006

      Southwest Asia

      1st Battle Group / Battalion lineage · Credited overseas service

      The Army lineage lists a unit decoration for service in these years. These are credited service years, not exact deployment and return dates.

      Source

    2. 2008-2009

      Iraq

      1st Battle Group / Battalion lineage · Credited overseas service

      The Army lineage lists a unit decoration for service in these years. These are credited service years, not exact deployment and return dates.

      Source

    3. 2003

      Iraq

      1st Battle Group / Battalion lineage · Deployment / overseas operation

      Deployed with 2d Brigade, 1st Armored Division; entered Baghdad in May.

      Source
  19. 16 Sep 2010 – page cutoff*

    1st Battle Group / Battalion lineage

    Last documented: 1st Armored Division

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

  20. 20 Jul 1944 – 1 May 1946

    2d Battle Group / Battalion lineage

    1st Armored Division

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

    Source

  21. 1 May 1946 – 20 Sep 1947

    2d Battle Group / Battalion lineage

    1st Constabulary Regiment

    This headquarters is not a division. Temporary attachments in the service entries below are distinct from the formal assignment.

    Source

  22. 20 Sep 1947 – 16 Oct 1950

    2d 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

  23. 16 Oct 1950 – 1 Jun 1958

    2d Battle Group / Battalion lineage

    No assigned division

    The cited record establishes service outside an assigned division. Higher headquarters and temporary operational attachments could still direct the unit.

    Source

  24. 1 Jun 1958 – 1 Sep 1963

    2d Battle Group / Battalion lineage

    No assigned division

    The cited record establishes service outside an assigned division. Higher headquarters and temporary operational attachments could still direct the unit.

    Source

  25. 1 Sep 1963 – 29 Jun 1984

    2d Battle Group / Battalion lineage

    Berlin Brigade

    This headquarters is not a division. Temporary attachments in the service entries below are distinct from the formal assignment.

    Source

  26. 29 Jun 1984 – 1 Aug 1984

    2d 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

  27. 1 Aug 1984 – 17 Jan 1992

    2d Battle Group / Battalion lineage

    1st Armored Division

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

    Source

  28. 17 Jan 1992 – 16 Aug 1992

    2d Battle Group / Battalion lineage

    3d Infantry Division

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

    Source

  29. 16 Aug 1992 – 16 Feb 1997

    2d 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

  30. 16 Feb 1997 – page cutoff*

    2d Battle Group / Battalion lineage

    Last documented: 1st Armored Division

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

    Deployments & overseas operations

    1. 2003

      Iraq

      2d Battle Group / Battalion lineage · Deployment / overseas operation

      Deployed with 2d Brigade, 1st Armored Division.

      Source

    2. 2005

      Iraq

      2d Battle Group / Battalion lineage · Deployment / overseas operation

      Returned for another Operation Iraqi Freedom deployment.

      Source

    3. 2008

      Iraq

      2d Battle Group / Battalion lineage · Deployment / overseas operation

      Another deployment began in April.

      Source
  31. 20 Jul 1944 – 1 May 1946

    4th Battle Group / Battalion lineage

    1st Armored Division

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

    Source

  32. 1 May 1946 – 20 Sep 1947

    4th Battle Group / Battalion lineage

    1st Constabulary Regiment

    This headquarters is not a division. Temporary attachments in the service entries below are distinct from the formal assignment.

    Source

  33. 20 Sep 1947 – 16 Oct 1950

    4th 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

  34. 16 Oct 1950 – 1 Jun 1958

    4th Battle Group / Battalion lineage

    No assigned division

    The cited record establishes service outside an assigned division. Higher headquarters and temporary operational attachments could still direct the unit.

    Source

  35. 1 Jun 1958 – 1 Jun 1959

    4th 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

  36. 1 Jun 1959 – 31 Dec 1965

    4th Battle Group / Battalion lineage

    102d Infantry Division

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

    Source

  37. 31 Dec 1965 – 13 Sep 1972

    4th 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

  38. 13 Sep 1972 – 29 Jun 1984

    4th Battle Group / Battalion lineage

    Berlin Brigade

    This headquarters is not a division. Temporary attachments in the service entries below are distinct from the formal assignment.

    Source

  39. 29 Jun 1984 – 1 Aug 1984

    4th 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

  40. 1 Aug 1984 – 16 Dec 1992

    4th Battle Group / Battalion lineage

    5th Infantry Division

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

    Source

    Deployments & overseas operations

    1. 1989

      Panama

      4th Battle Group / Battalion lineage · Deployment / overseas operation

      Deployed in September and took part in Operation Just Cause.

      Source
  41. 16 Dec 1992 – 16 Mar 2008

    4th 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

  42. 16 Mar 2008 – page cutoff*

    4th Battle Group / Battalion lineage

    Last documented: 1st Armored Division

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

    Deployments & overseas operations

    1. 2009-2010

      Iraq

      4th Battle Group / Battalion lineage · Credited overseas service

      The Army lineage lists a unit decoration for service in these years. These are credited service years, not exact deployment and return dates.

      Source

    2. 2011

      Iraq

      4th Battle Group / Battalion lineage · Deployment / overseas operation

      Served from August through December during Operation New Dawn.

      Source

Service note · dates incomplete

5th Battalion · Fort Hood and Fort Polk

Served with the 1st Armored Division in 1970-1971 and later with the 5th Infantry Division. Exact transition dates remain unverified.

Source

Service note · dates incomplete

6th Battalion · Gulf War service

Served with the 1st Armored Division in Germany and deployed for Desert Shield and Desert Storm in 1990-1991.

Source

Service note · dates incomplete

7th Battalion · Gulf War service

Served with the 1st Armored Division in Germany and deployed for Desert Shield and Desert Storm in 1990-1991.

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: 6th Infantry Regiment
  2. U.S. Army Center of Military History: 1st Battalion 6th Infantry Regiment
  3. U.S. Army Center of Military History: 2d Battalion 6th Infantry Regiment
  4. U.S. Army Center of Military History: 4th Battalion 6th Infantry Regiment
  5. 6th 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.