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9th Infantry Division (United States)

United States Army unit

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionSep 27, 2026
Entity authoritySource title only
Source-derived summary

The 9th Infantry Division is an inactive infantry division of the United States Army. It was formed as the 9th Division during World War I, but never deployed overseas. In later years it was an important unit of the U.S. Army during World War II and the Vietnam War. It was also activated as a peacetime readiness unit from 1947 to 1962 at Fort Dix, New Jersey, as a Training Division, West Germany, and Fort Carson, Colorado, as a Full Combat Status Division, and from 1972 to 1991 as an active-duty infantry division at Fort Lewis, Washington. The division was inactivated in December 1991.

Editorial summary

Begin with the source’s own compact description: “9th Infantry Division (United States)” is united States Army unit. The dossier treats that line as a proposition to test through Infantry, Division and United, not as a finished interpretation.

Editorial reviewA dependable orientation record for establishing vocabulary, names and a first evidence trail. The current lead gives the account dated anchors—1947, 1962, 1972, 1991—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, Infantry, Division and United is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “united States Army unit” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 27, 2026. The first chronological checks are 1947, 1962, 1972 and 1991.

Critical limits

A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

How to read it

Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.

Best used for
  • Subject orientation
  • Search vocabulary
  • Locating named sources
Verify next

The closest primary source, responsible institution and strongest cited specialist reference.

Three-step research path

  1. Establish the record: confirm the title “9th Infantry Division (United States)”, its source revision and the description used here.
  2. Expand the search: follow 9th Infantry Division (United States) primary sources, 9th Infantry Division (United States) archive and Infantry research across catalogues and specialist indexes.
  3. Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.

Questions for further research

  1. Which source most directly establishes the central claim about “9th Infantry Division (United States)”?
  2. Which cited source is closest to the event, object or claim?
  3. What terminology or title could unlock a more precise catalogue search?
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Source & attribution

This entry incorporates text from “9th Infantry Division (United States)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.