178th Infantry Regiment
Assignment not established
The available record does not establish a precise assignment throughout this interval. No division is inferred.
First division shownNot establishedSee source notes
Separate unit histories1 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. Battalion rows follow headquarters lineages, often descended from lettered companies, rather than assuming that the old regimental battalions continued unchanged.
Approximate wartime windows identify documented affiliations within the labeled years. Their boundaries are coverage limits, not assignment or inactivation orders. Unverified intervals remain visible; common regimental service does not establish the later assignments of each battalion.
Division patches
Division names appear in the timeline. No verified patch artwork is included for these assignments.
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.
The dated record
Division timeline
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 – 6 Oct 1940
-
6 Oct 1940 – 1 Jan 1947
178th Infantry Regiment
Converted to another branch
Lineage service in another branch or under a predecessor designation. This interval is not plotted as an infantry maneuver-division assignment.
-
1 Jan 1947 – page cutoff*
178th Infantry Regiment
Last documented: Assignment not established
The available record does not establish a precise assignment throughout this interval. No division is inferred. 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.
-
29 May 2009 – page cutoff*
1st Battle Group / Battalion lineage
Last documented: 33d Infantry Brigade · Brigade assignment
An Army report confirms the battalion with the 33d Infantry Brigade in Afghanistan. This is a dated observation, not its initial assignment date. 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.
Deployments & overseas operations
2009
Afghanistan
1st Battle Group / Battalion lineage · Deployment / campaign service
Security and provincial reconstruction support with the 33d Brigade.
Source
Sources and scope
Army Center of Military History lineage certificates, regimental associations and secondary histories document assignments, operations and battalions. Exact lineage dates and approximate historical coverage are distinguished. 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.
- 178th Infantry Regiment history (Wikipedia; secondary)
- U.S. Army: 178th Infantry with 33d Brigade in Afghanistan, May 2009
Patch artwork
Unmodified artwork from Wikimedia Commons; individual file pages identify the artist and license. Insignia represent the divisions, not regimental affiliation badges.