Mapping Who Got Which Weapons

Introduction

For anyone studying how foreign military technology spreads beyond its country of origin, the SIPRI Arms Transfers Database is one of the most useful open sources available. Rather than focusing on classified intelligence or battlefield captures, it provides a systematic record of which countries received major conventional weapon systems, when those deliveries occurred, and who supplied them. That information does not reveal technical secrets directly. What it does reveal is where specific technologies became accessible, observable, maintainable, trainable, and potentially examinable outside the original producing state. In the context of reverse engineering foreign military technology, SIPRI data functions as a map of technology exposure: it identifies where advanced aircraft, missiles, radars, warships, armoured vehicles, and related systems entered new operational environments and became available for study through legal ownership, maintenance activities, exercises, inspections, or later conflict events.[SIPRI]sipri.orgSIPRI Arms Transfers DatabaseThe SIPRI Arms Transfers Database contains information on all transfers of major conventional arms from…

What Arms-Transfer Data Can Show

The SIPRI Arms Transfers Database records international transfers of major conventional weapons from 1950 onwards and is built around actual deliveries rather than merely announced contracts. It tracks suppliers, recipients, weapon categories, quantities, and delivery periods, creating a historical record of how military technologies have moved across borders.[SIPRI]sipri.orgSIPRI Arms Transfers DatabaseThe SIPRI Arms Transfers Database contains information on all transfers of major conventional arms from…

For technology-analysis purposes, this creates several forms of evidence.

First, it identifies where a specific technology family became physically present. If a country imported a particular fighter aircraft, air-defence system, radar, or anti-ship missile, analysts can infer that the receiving military gained at least some degree of access to operating procedures, maintenance practices, spare parts, training materials, and technical support associated with that system. SIPRI data therefore helps answer a practical question: where might foreign technology be observed outside its original manufacturer’s control?[SIPRI]sipri.orgSIPRI Arms Transfers DatabaseThe SIPRI Arms Transfers Database contains information on all transfers of major conventional arms from…

Second, the database helps identify clusters of exposure. A single transfer may be limited, but repeated deliveries of aircraft, weapons, sensors, and support equipment from the same supplier often indicate a deeper technological relationship. A country that imports combat aircraft, airborne radar, missiles, and training systems from one exporter is likely receiving broader operational knowledge than a country that acquires a small number of isolated platforms.[Arms Transfer Database]armstransfers.sipri.orgOpen source on sipri.org.

Third, SIPRI records manufacturing licences as part of arms transfers. Licensed production is particularly important because it often indicates a higher level of industrial access than straightforward equipment purchases. When production shifts partially into the recipient country, engineers, technicians, and defence industries may gain greater familiarity with manufacturing processes, subsystem integration, and sustainment requirements.[SIPRI]sipri.orgCoverageThe SIPRI Arms Transfers Database covers all international sales and gifts of weapons, including manufacturing licences. Wea…

How Transfer Timelines Support Technology Analysis

The most valuable feature for technology-exposure mapping is often not the list of weapons itself but the timing information attached to deliveries.

SIPRI’s methodology emphasises actual deliveries of major weapons rather than procurement announcements. As a result, analysts can estimate when a technology became available in a recipient country and correlate that timing with later events.[SIPRI]sipri.orgSources and methodsSIPRI statistical data on arms transfers relates to actual deliveries of major conventional weapons. To permit co…

This allows several forms of analysis:

• Exposure windows. Analysts can determine when a recipient first gained access to a system and how long it has operated it.
• Maintenance opportunities. Long service histories imply repeated maintenance cycles, upgrades, training programmes, and depot-level work that expose personnel to system details.
• Regional diffusion. Delivery records show how a technology spreads from one region to another over time.
• Conflict correlation. If a weapon later appears in a war, observers can compare battlefield sightings with prior transfer records to understand likely origins and support networks.[SIPRI]sipri.orgSIPRI Arms Transfers DatabaseThe SIPRI Arms Transfers Database contains information on all transfers of major conventional arms from…

For example, if SIPRI records show deliveries of a particular surface-to-air missile system years before a conflict, analysts know the recipient state had a substantial period to train operators, establish logistics chains, and build technical familiarity. That knowledge helps distinguish between newly introduced technology and systems that have undergone years of local adaptation.

The database is also useful for reconstructing supplier-recipient networks. A country receiving systems from multiple suppliers may become a location where different technological traditions interact. This can be important when assessing opportunities for comparative study, interoperability testing, or the transfer of operational knowledge between military communities.[SIPRI]sipri.orgSIPRI Arms Transfers DatabaseThe SIPRI Arms Transfers Database contains information on all transfers of major conventional arms from…

Why SIPRI Is Especially Useful as Open Evidence

Many governments publish only partial information about arms exports, while some major exporters release little or no comprehensive public data. SIPRI attempts to standardise information from open sources into a single long-term database covering major conventional weapons transfers. Researchers frequently use it because it provides a consistent cross-country record that would otherwise be difficult to assemble.[World Peace Foundation]worldpeacefoundation.orgsipris arms trade data for 2017World Peace FoundationSIPRI's arms trade data for 2017Mar 19, 2018 — What SIPRI's TIV data does do is provide the only reliable internati…

The database’s structure also allows analysts to move beyond anecdotal reporting. Instead of relying on isolated news stories about a weapons sale, users can examine decades of deliveries, identify patterns of dependence, and compare different supplier-recipient relationships over time.[SIPRI]sipri.orgSIPRI Arms Transfers DatabaseThe SIPRI Arms Transfers Database contains information on all transfers of major conventional arms from…

SIPRI’s use of the Trend Indicator Value (TIV) further helps identify broad patterns in the movement of major weapon systems. Although TIV is not a price measure, it provides a standardised way to compare the volume of transfers across different weapon categories and time periods.[sipri.org]sipri.orgSources and methodsSIPRI statistical data on arms transfers relates to actual deliveries of major conventional weapons. To permit co…

For technology-exposure analysis, the exact monetary value is often less important than knowing that a substantial quantity of a system was delivered and entered service. The database therefore supports questions about technological presence and diffusion rather than commercial profitability.

Where Open Databases Fall Short

SIPRI’s strengths are significant, but its limitations matter just as much when assessing technology exposure.

The database focuses on major conventional weapons. It does not provide a complete picture of all military technology transfers. Many sensitive elements of modern military capability—including software, algorithms, electronic warfare techniques, technical assistance, classified upgrades, cyber capabilities, and some specialised subsystems—fall outside what can be systematically tracked through open arms-transfer records.[DataBank]databank.worldbank.orgArms exports (SIPRI trend indicator values) - DataBankArms transfers (exports) cover the volume of transfers of major arms throug…

The database is also based on open-source reporting. SIPRI itself notes that publicly available information is often incomplete, contradictory, or uncertain regarding delivery dates, quantities, configurations, suppliers, and recipients. Some transfers are intentionally concealed, while others become public only years later.[SIPRI]sipri.orgAppendix 13DSources and methods for arms transfers databy B HAGELIN — Data are collected from open sources in the SIPRI arms transfers database and p…

Another limitation is that the database records the movement of weapon systems, not the depth of technical access. Two countries may both import the same aircraft, yet one may receive extensive maintenance rights, local assembly privileges, and industrial participation while the other receives a tightly controlled export package. The transfer record alone cannot fully reveal those differences.[SIPRI]sipri.orgCoverageThe SIPRI Arms Transfers Database covers all international sales and gifts of weapons, including manufacturing licences. Wea…

Finally, SIPRI identifies where technology arrived, but not what happened afterwards. The database cannot determine whether recipient engineers learned significant technical details, whether systems were later inspected by third parties, or whether knowledge from operating a weapon translated into successful reverse-engineering efforts. It maps exposure opportunities, not the outcomes of those opportunities.

Reading SIPRI Data as a Technology-Exposure Map

Viewed through the lens of foreign military technology analysis, SIPRI’s database is less a catalogue of arms sales than a geographical and chronological map of access. Each recorded transfer marks a location where a weapon system, its operators, its maintainers, and at least some associated technical knowledge crossed national boundaries.[SIPRI]sipri.orgSIPRI Arms Transfers DatabaseThe SIPRI Arms Transfers Database contains information on all transfers of major conventional arms from…

That does not mean every transfer creates meaningful reverse-engineering opportunities. Export controls, downgraded configurations, restricted software, and tightly managed support arrangements often limit what recipients can learn. Yet the database remains valuable because it identifies where those opportunities could exist. For analysts seeking to understand how military technology spreads beyond its original developers, SIPRI’s transfer records provide one of the clearest open-source foundations for tracing who obtained which weapons, when they received them, and where foreign technology became available for observation and study.[SIPRI]sipri.orgCoverageThe SIPRI Arms Transfers Database covers all international sales and gifts of weapons, including manufacturing licences. Wea…

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Endnotes

1. Source: sipri.org
Link:https://www.sipri.org/databases/armstransfers

2. Source: sipri.org
Link:https://www.sipri.org/databases/armstransfers/sources-and-methods

3. Source: sipri.org
Link:https://www.sipri.org/databases/armstransfers/background/coverage

4. Source: armstransfers.sipri.org
Link:https://armstransfers.sipri.org/ArmsTransfer/

5. Source: sipri.org
Title: Appendix 10C
Link:https://www.sipri.org/sites/default/files/YB06%20560%2010C.pdf

6. Source: sipri.org
Link:https://www.sipri.org/sites/default/files/2025-03/fs_2503_at_2024_0.pdf

7. Source: armstransfers.sipri.org
Link:https://armstransfers.sipri.org/

8. Source: sipri.org
Link:https://www.sipri.org/databases

9. Source: sipri.org
Link:https://www.sipri.org/sites/default/files/2026-03/fs_2603_at_2025.pdf

10. Source: sipri.org
Title: Appendix 13D
Link:https://www.sipri.org/sites/default/files/535-538%20App.13D_0.pdf

11. Source: sipri.org
Title: Appendix 10B
Link:https://www.sipri.org/sites/default/files/YB07%20426%2010B.pdf

12. Source: sipri.org
Link:https://www.sipri.org/

13. Source: sipri.org
Link:https://www.sipri.org/databases/financial-value-global-arms-trade

14. Source: sipri.org
Link:https://www.sipri.org/sites/default/files/yb05%20522%2010c.pdf

15. Source: sipri.org
Link:https://www.sipri.org/yearbook/1998/08

16. Source: sipri.org
Link:https://www.sipri.org/databases/armsindustry

17. Source: sipri.org
Title: trends international arms transfers 2025
Link:https://www.sipri.org/publications/2026/sipri-fact-sheets/trends-international-arms-transfers-2025

Published: March 2026

18. Source: worldpeacefoundation.org
Title: sipris arms trade data for 2017
Link:https://worldpeacefoundation.org/blog/sipris-arms-trade-data-for-2017/

19. Source: databank.worldbank.org
Title: Data Bank Arms imports (SIPRI trend indicator values)
Link:https://databank.worldbank.org/metadataglossary/world-development-indicators/series/MS.MIL.MPRT.KD

20. Source: databank.worldbank.org
Link:https://databank.worldbank.org/metadataglossary/world-development-indicators/series/MS.MIL.XPRT.KD

21. Source: files.ethz.ch
Link:https://www.files.ethz.ch/isn/156913/SIPRIFS1212.pdf

22. Source: Wikipedia
Title: SIPRI Arms Transfers Database, Iraq 1973–1990
Link:https://en.wikipedia.org/wiki/SIPRI_Arms_Transfers_Database%2C_Iraq_1973%E2%80%931990

23. Source: linkedin.com
Link:https://www.linkedin.com/company/sipri

24. Source: attmonitor.org
Title: data on arms transfers
Link:https://attmonitor.org/en/arms-trade-treaty-portal/data-on-arms-transfers/

25. Source: euromesco.net
Link:https://www.euromesco.net/institute/sipri-stockholm-international-peace-research-institute/

26. Source: whoarmswar.tufts.edu
Link:https://whoarmswar.tufts.edu/methodology/

Additional References

27. Source: researchgate.net
Link:https://www.researchgate.net/figure/The-trend-in-international-transfers-of-major-conventional-weapons-2000-2009-Note-The_fig1_265643479

28. Source: unidir.org
Link:https://unidir.org/files/conferences/pdfs/arms-transfers-to-europe-and-central-asia-sipri-eng-0-221.pdf

29. Source: linkedin.com
Link:https://www.linkedin.com/pulse/new-data-international-arms-transfers-russian-military-budget-imported-jre8f

30. Source: lab.imedd.org
Title: armaments israel and the others
Link:https://lab.imedd.org/en/armaments-israel-and-the-others/

31. Source: Wikipedia
Title: Stockholm International Peace Research Institute
Link:https://en.wikipedia.org/wiki/Stockholm_International_Peace_Research_Institute

32. Source: youtube.com
Link:https://www.youtube.com/watch?v=K5OJSeaGkcA

33. Source: youtube.com
Link:https://www.youtube.com/watch?v=jUxbYXnh00M

34. Source: youtube.com
Title: Global Arms Trade: Who Holds the Power | World Business Watch
Link:https://www.youtube.com/watch?v=jy1Pi0-Sos0

35. Source: youtube.com
Title: Trends in Global Arms Transfers and Military Spending
Link:https://www.youtube.com/watch?v=5DBbsp5jmDw

36. Source: youtube.com
Title: Europe’s Rearmament: A Shift in Military Dependence
Link:https://www.youtube.com/watch?v=lArWEdH0CFI