1916–2026 · Regimental service, battle groups, battalions and deployments.
15th Infantry Regiment
First division shownPhilippine Division17 Jul 1922
Separate battalion histories5 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 Jul 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 Philippine Division assignment applied to the regiment in 1922, but after April 1923 only the old 1st Battalion retained it. That battalion was inactivated in 1929 and released in 1931. The common row therefore marks 1923-1940 as mixed/unverified instead of assigning the entire China-based regiment to the Philippine 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.
At a glance
Assignments across time
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.
Division assignment
1st Infantry
2d Infantry
8th Infantry
Separate headquarters
Training / academy
Inactive
Unverified / last documented
Explore a date
Who were they with?
Look up the dated rows below. Service notes with incomplete dates are excluded; last-documented results do not certify a current assignment.
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 Jan 1916 – 17 Jul 1922
15th Infantry Regiment
Assignment not established
The available record does not establish a precise assignment throughout this interval. No division is inferred.
The regiment served in China during this part of its history; service was interrupted by changing battalion arrangements. This location record is not a claim of one continuous division assignment. The labeled service overlaps an assignment change and is listed only once; consult the following assignment cards as well.
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.
3d 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.
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.
The association records service with the 194th Armored Brigade beginning in 1987, followed by battalion inactivation in 1990-1991. Two companies continued until 1995.
The association records activation on 16 June 1989 and reflagging as the 1st Battalion on 14 June 1991. This note does not infer a division assignment from the garrison alone.
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.
Philippine Division
3d Infantry Division
63d Infantry Division
24th Infantry Division
