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Research dossier · General Reference

S-400 missile system

Mobile surface-to-air missile air defense

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionSep 17, 2026
Entity authoritySource title only
Source-derived summary

The S-400 Triumf, previously known as the S-300 PMU-3, is a mobile surface-to-air missile (SAM) system developed in the 1990s by Russia's NPO Almaz as an upgrade to the S-300 family of missiles. The S-400 was approved for service on 28 April 2007 and the first battalion of the systems assumed combat duty on 6 August 2007. Its longest-ranged interceptor missile, the 40N6, has a purported range of 400 km. The S-400 can be integrated with the shorter-ranged Pantsir missile system, and potentially airborne radars such as of the Beriev A-50U and Sukhoi Su-35S.

Editorial summary

Begin with the source’s own compact description: “S-400 missile system” is mobile surface-to-air missile air defense. The dossier treats that line as a proposition to test through S-400, missile and system, not as a finished interpretation.

Editorial reviewA practical starting point whose main value is the path it opens into stronger specialist and primary sources. The current lead gives the account dated anchors—2007—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, S-400, missile and system is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “mobile surface-to-air missile air defense” 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 17, 2026. The first chronological checks are 2007.

Critical limits

The absence of detail may reflect summary conventions rather than a lack of surviving documentation. 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.

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

Three-step research path

  1. Establish the record: confirm the title “S-400 missile system”, its source revision and the description used here.
  2. Expand the search: follow S-400 missile system primary sources, S-400 missile system archive and S-400 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

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Source & attribution

This entry incorporates text from “S-400 missile system” 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.