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How is international armaments cooperation different from Foreign Military Sales?

Updated 29 September 2026Checked against the SAMM: 12 September 2026

is the U.S. Government working with other countries and international organizations to research, develop, acquire and sustain military systems, mostly in the earlier phases of a system's life cycle. normally comes later, once a system is developed and in production. Armaments cooperation answers to a different under secretary and runs on negotiated international agreements rather than Letters of Offer and Acceptance.

THE LIFE OF A SYSTEM, AND THREE WAYS A PARTNER JOINS IT fmsedge.com Requirement Development Production Fielded Sustainment Partner-funded development the partner pays to develop; the U.S. may buy it later The partner’s need a special feature, or a unique or joint requirement (Glossary: Special RDT&E and Nonrecurring Production Costs) F-15SA Saudi Arabia pays to develop the first fly-by-wire Eagle F-15QA Qatar’s version builds on it F-15EX the U.S. Air Force buys it; first delivered March 2021 Wedgetail Australia contracts Boeing to develop it, 2002 United Kingdom contracts for Wedgetails, 2019 U.S. Air Force E-7 chosen to replace the E-3; as of September 2026* NSM · Iron Dome developed by Norway’s Kongsberg and by Israel’s Rafael U.S. Navy · U.S. Army the Navy buys NSM from FY2019; the Army, two Iron Dome batteries What is nonrecurring cost recoupment in Foreign Military Sales? Who pays whom Special NC: developed under an FMS case at a buyer’s request, the buyer pays as costs are incurred. Glossary · C9.T4 Cooperatively produced: the agreement governs it. C15.3.7.2.4.1 Cooperative program shared cost, shared results Across every phase research, develop, acquire and sustain together C2.1.7.2.1 · C4.3.1.1 SM-3 Block IIA U.S. and Japan; Japan develops and pays for some technologies Not a buyer and a seller: each participant puts in resources for a share of the results, under an international agreement rather than an LOA. CRS IF12425 · C2.1.7.2.1 · NC may be collected as part of a cooperative project: C9.6.3.2.5 FMS of a fielded system the usual way in The exception: a non-program of record a capability DoW has not formally adopted, fielded or funded; purchasers ask for them routinely, and DoW takes reasonable steps to support systems U.S. forces do not use C9.3.4.7 · C5.2.2.7 · C4.4.3.2 FMS USUALLY ENTERS HERE: A SYSTEM THE DEPARTMENT ALREADY BUILDS AND FIELDS What is a Letter of Request in Foreign Military Sales? Letter of Request the purchaser asks for the article it wants to buy What is nonrecurring cost recoupment in Foreign Military Sales? NC recoupment a pro rata share of U.S. RDT&E and production start-up (C9.T4) Foreign Military Sales vs Direct Commercial Sales: which one, and who decides? Or buy it commercially no NC on a direct commercial sale since 1992 (C9.T4) “Usually, an FMS system sale involves a weapon system that the Department has already developed, produced, tested, and fielded for its own use.” (WarU Acquipedia) * Current as of September 2026: Congress rejected the plan to cancel the E-7 in the FY2026 budget, and the Air Force awarded E-7 contracts in March 2026. Not partner-funded: the MQ-9B. General Atomics funded the certifiable version itself; the UK, its launch customer, bought it through FMS. Examples: CRS R46801, IF12045, RL33745, R45996, RL33222; Air & Space Forces Magazine; Breaking Defense; General Atomics; DSCA. FMS Edge a buyer or a step · the partner pays to develop · shared, or the exception fmsedge.com · Current as of 27 September 2026 · SAMM C2.1.7.2.1 · C9.T4 · C9.3.4.7 · C15.3.7.2.4.1 · Glossary · CRS

Foreign Military Sales usually sells a system the Department has already developed, produced and fielded, but a partner does not have to come last. A partner can pay to develop a system the United States later buys, as with the F-15SA that led to the Air Force's F-15EX and the Wedgetail the Air Force chose as its E-7; it can work with the United States through every phase under an international agreement, as Japan did on the SM-3 Block IIA; or it can buy a fielded system through FMS, paying a share of U.S. development costs. The E-7 line is current as of September 2026.

Where FMS joins the life cycle · Current as of 27 September 2026 · SAMM C2.1.7.2.1 · C9.T4 · C9.3.4.7 · C15.3.7.2.4.1 · Glossary · CRS · Download PNG

How is international armaments cooperation different from Foreign Military Sales?

When doing activities, the U.S. may work with friends and allies across the entire system acquisition life cycle. normally (unless a policy exception is approved) occurs later in the life cycle after the system has already been fully developed and placed into production. primarily represents opportunities to cooperatively work with other countries in the earlier developmental phases of a system’s life cycle.

is generally conducted with nations that have solid political and economic ties with the U.S., similar military requirements, and a reasonably robust defense, science and technology base. Although some countries may be quite important from a political, economic, or military standpoint, if they have different military requirements or lack a substantial defense , there may be little potential for successful activity.

What armaments cooperation is for

The core objectives of typically include the following:

  • Operational: increase military effectiveness through interoperability and partnership with allies and coalition partners
  • Economic: reduce weapons acquisition cost by sharing costs, economies of scale and avoiding duplication of development efforts with our allies and friends
  • Technical: access the best defense technology worldwide and help minimize the capabilities gap with allies and coalition partners
  • Political: strengthen alliances and relationships with other friendly countries
  • Industrial: bolster domestic and allied defense industrial bases

Who oversees it

The established the Office of International Cooperation (IC) to oversee activities. The has a supporting role in IC by reviewing international agreements for foreign policy considerations.

Support in the partner country

In addition to the sponsored overseas offices, the DoW assigns dedicated personnel within countries that conduct a significant volume of activity with the U.S. These dedicated armaments cooperation personnel assigned overseas serve as the in-country liaison for the . They assist the host government obtain information on U.S. equipment and programs as well as help DoW acquisition organizations obtain information on host nation equipment, requirements and programs in support of . This function extends to assisting industry in gaining access to the other nation’s defense markets and in developing cooperative programs.

International agreements instead of Letters of Offer and Acceptance

/IC programs use international agreements as the official government-to-government document rather than Letters of Offer and Acceptance (). Under one or more of the /IC authorities, the U.S. and one or more countries are agreeing to cooperate in research, development, acquisition, or sustainment activity. The international agreement serves as the basis to define the extent and methods for the cooperative activity. Fundamentally, the participants must agree on how the work will be performed, how any costs will be shared and the extent of rights to utilize the results of the cooperative activities. International agreements may be referred to as Memorandums of Understanding () or Memorandums of Agreement (). Unlike , international agreements constitute a binding commitment subject to international law. Instruction 5530.03, International Agreements, governs the international agreements process.

Unlike , international agreements are developed through a process of negotiation. To assist in developing armaments cooperation international agreements, the DoW created the international agreements generator. This software permits draft agreements to be quickly developed while ensuring they conform to relevant U.S. law, regulations, and policies as well as the generally accepted international agreement formats and norms used by foreign nations.

References

Drawn exclusively from publicly available authorities.

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