From Letter of Intent to Structured Programme

In November 2024, seventeen Ministers of Defence signed a Letter of Intent (LoI) at the European Defence Agency (EDA) to purchase and develop loitering munitions collectively. Spain joined the initiative in April 2025, bringing the total to 18 participating nations. The political signal was clear: individual, ad-hoc procurement of loitering munitions from national budgets and foreign markets was no longer considered adequate for credible European deterrence.

The EDA’s initial remit was deliberately narrow. Rather than launching a full-scale development programme, the Agency was tasked with building a business case — a foundational document combining a common lexicon, a market survey of available systems, a needs assessment drawn from the 18 nations, and a structured overview of joint procurement options. That business case was approved in September 2025.

Giuseppe Dello Stritto, Head of Unit Land and Logistics at EDA, has described the effort as “aggregating demand to prevent fragmented procurement through multiple national contracts for similar capabilities, instead focusing investment on a few scalable systems.” The first task was to establish common understanding across the 18-nation working group, drawing on expertise from think tanks, munitions specialists, and NATO allies.

Why Loitering Munitions — and Why Now

The operational logic is straightforward. Loitering munitions provide precision strike, real-time intelligence, surveillance, and reconnaissance (ISR), and tactical flexibility that traditional fire-support systems cannot deliver in decentralised or urban operations. Unlike conventional Unmanned Aerial Vehicles (UAVs), a loitering munition is classified as a munition — a distinction that carries specific legal, safety, and operational implications under international humanitarian law and NATO storage and transport regulations.

Ukraine and Russia have both demonstrated the battlefield relevance of these systems since 2022. West Germany pioneered the concept in the 1970s, but European development was largely discontinued after the Cold War. Ukraine, Russia, Iran, Israel, and Turkey have since driven the technology forward with domestically produced variants. The result: loitering munitions are in short supply across EU arsenals, and European industry — while capable — is fragmented.

The EDA’s market survey, which gathered responses from over 50 companies across all EU Member States plus the European Economic Area (EEA) countries of Iceland, Liechtenstein and Norway, confirmed that the European industrial base is not absent but dispersed. Too many smaller firms operate alongside a handful of larger manufacturers, with limited standardisation between them. Mihai Ionita, EDA’s Project Officer for Land Programmes, has noted that “potential demand is in the several hundreds of millions of euros over a five-to-ten-year horizon.”

The Classification Problem: Munition, Not Drone

The 18 participating nations have adopted working definitions that distinguish three categories of loitering munition — a critical step toward common procurement specifications:

The distinction between “munition” and “UAV” is not semantic. Classifying something as a munition rather than an unmanned aerial vehicle carries legal, safety, and operational consequences. Dello Stritto has stated that “for loitering munitions, NATO standards and certification frameworks are largely absent.” The systems cross operational domains — ground, air, and maritime — and range from short-range tactical kits to long-range strike platforms. Some variants operate underwater. This breadth complicates any attempt to apply a single qualification framework.

Munitions do not need to meet the same airworthiness certification standards as aircraft, but they still require rigorous operational and environmental testing. No existing NATO Allied Quality Assurance Publication (AQAP) or STANAG specifically addresses the qualification of loitering munitions as a class. The Conference of National Armaments Directors (CNAD) Ammunition Safety Group (CASG, AC/326) governs ammunition life-cycle safety through standards like STANAG 4439 (Insensitive Munitions policy) and the AASTP series, but these were not drafted with autonomous loiter-and-strike systems in mind.

The Participating Nations

The 18 signatories represent a broad cross-section of EU defence postures, from major industrial powers to smaller nations seeking affordable precision-strike capabilities:

Several of these nations — notably France, Germany, and Italy — already have national loitering munition programmes or bilateral agreements. Germany, for example, approved mass procurement of the Israeli-developed HERO series from Rheinmetall in 2025. Six nations (France, Germany, Italy, Poland, Sweden, and the United Kingdom) signed a separate Letter of Intent in February 2026 under the European Long-range Strike Approach (ELSA) to co-develop a 500 km-range one-way attack effector with an estimated 50 kg warhead and a target unit cost in the five-figure range.

The EDA initiative sits alongside these bilateral and multilateral tracks. It is broader in scope — covering short-range tactical, medium-range, and long-range systems across ground, air, and maritime domains — but more cautious in ambition. The business case is a precursor to procurement, not a procurement contract.

From Business Case to Capability: What Comes Next

The approved business case provides a structured foundation, but EDA itself lacks the engineering, test centres, and contracting power to act as an acquisition entity. Several solutions are under consideration. One option is to assign contracting and testing to organisations with existing engineering capacity, such as the NATO Support and Procurement Agency (NSPA) or the Organisation for Joint Armament Co-operation (OCCAR). Another is to rely on lead nations — likely France, Germany, and Italy — managing work on Ammunition and Missiles under the Defence Readiness 2030 roadmap, using national facilities and technical staff to validate prototypes and refine specifications.

A broader capability development programme is simultaneously being prepared. This programme aims to create a cooperative framework enabling partners to jointly develop all elements needed to transition from equipment procurement to full military capability — including doctrine, training, logistics, and sustainment.

The long-term vision, as described in EDA publications, is to move from concepts and shared facilities to research, and eventually to the development of a European family of loitering munitions. Whether that results in a genuine coalition of buyers or remains a list of good intentions depends on whether the 18 nations can sustain political consensus through the difficult phases of requirement harmonisation, industrial workshare negotiation, and acceptance testing.

ISC Commentary

Further analysis pending.