Infantry timelines · Infantry numbers 1–200
A century of division assignments
1916–2026 · Regimental service, battle groups, battalions and deployments.
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 Feb 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.
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.
At a glance
Bar widths follow elapsed time.
Scroll horizontally on a small screen. Select a segment to open its dated entry. Diamond markers open deployments; their positions indicate the labeled year, not an exact start date or duration. Short assignments are easier to inspect in the list below.
Explore a date
Look up the dated rows below. Service notes with incomplete dates are excluded; last-documented results do not certify a current assignment.
The dated record
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.
27th Infantry Regiment
The available record does not establish a precise assignment throughout this interval. No division is inferred.
1918-1920
27th Infantry Regiment · Deployment / overseas operation
Served with the American Expeditionary Force in Siberia.
Source27th Infantry Regiment
Division names are normalized across historical redesignations. This entry follows the cited unit lineage.
27th Infantry Regiment
Division names are normalized across historical redesignations. This entry follows the cited unit lineage.
1943-1945
27th Infantry Regiment · Campaign service
Campaign participation is recorded in the Army lineage. The year label summarizes campaign service, not an exact overseas tour.
Source1950-1953
27th Infantry Regiment · Campaign service
Campaign participation is recorded in the Army lineage. The year label summarizes campaign service, not an exact overseas tour.
Source1st Battle Group / Battalion lineage
Division names are normalized across historical redesignations. This entry follows the cited unit lineage.
1966-1970
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.
Source2004-2005
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. The labeled service overlaps an assignment change and is listed only once; consult the following assignment cards as well.
Source1st Battle Group / Battalion lineage
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.
2008-2009
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.
Source2d Battle Group / Battalion lineage
The unit or its headquarters lineage was inactive. This status does not imply that every inherited honor or divisional affiliation was erased.
2d Battle Group / Battalion lineage
The cited record establishes service outside an assigned division. Higher headquarters and temporary operational attachments could still direct the unit.
2d Battle Group / Battalion lineage
The unit or its headquarters lineage was inactive. This status does not imply that every inherited honor or divisional affiliation was erased.
2d Battle Group / Battalion lineage
Division names are normalized across historical redesignations. This entry follows the cited unit lineage.
1966-1970
2d 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.
Source2d Battle Group / Battalion lineage
The unit or its headquarters lineage was inactive. This status does not imply that every inherited honor or divisional affiliation was erased.
2d Battle Group / Battalion lineage
Division names are normalized across historical redesignations. This entry follows the cited unit lineage.
2d Battle Group / Battalion lineage
The unit or its headquarters lineage was inactive. This status does not imply that every inherited honor or divisional affiliation was erased.
2d Battle Group / Battalion lineage
Division names are normalized across historical redesignations. This entry follows the cited unit lineage.
2004-2005
2d 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. The labeled service overlaps an assignment change and is listed only once; consult the following assignment cards as well.
Source2d Battle Group / Battalion lineage
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.
2006-2007
2d 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.
Source2008-2009
2d 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.
SourceService note · dates incomplete
The regimental history identifies deployments with the 7th Infantry Division to Honduras in 1988 and Panama in 1989.
Service note · dates incomplete
Served with the 25th Infantry Division in Hawaii. Elements deployed for Desert Storm and performed security duties; this was not a deployment of the entire division.
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.
Unmodified artwork from Wikimedia Commons; individual file pages identify the artist and license. Insignia represent the divisions, not regimental affiliation badges.
