Greece

Europe is seeking to strengthen its defence capabilities and reduce its long-standing reliance on the United States. This has encouraged European states to increase defence spending, expand domestic production and diversify their procurement partnerships beyond traditional suppliers. Yet diversification does not necessarily amount to strategic independence. Replacing reliance on one external supplier with reliance on several others may reduce concentration risk without giving European states full control over the technologies on which their defence capabilities depend.   This distinction is becoming increasingly important as modern military systems become more dependent on software, data and interconnected command-and-control architectures. A country may possess the physical hardware of a weapons system while remaining dependent on a foreign supplier for critical software, upgrades, maintenance or technological integration. The question of who controls these underlying technologies can therefore be as important as who manufactures or owns the weapon itself.   The recent Achilles Shield agreement between Greece and Israel provides a useful illustration of this dilemma. The €3 billion agreement will establish a multilayered Greek air and missile defence network incorporating Israeli systems alongside a Greek-controlled command-and-control architecture. However, a dispute over access to the systems' source code has raised questions over the extent of Greece's technological control. The case highlights a broader issue for European defence: can greater diversification deliver genuine independence if critical elements of military capabilities remain technologically dependent on external powers?

In recent years, the Eastern Mediterranean has witnessed growing attention to air defence, maritime security and infrastructure protection. Against this backdrop, on 31 August 2026, Greece and Israel signed an agreement to develop an integrated air and missile defence network, known as ‘Achilles Shield’, at a cost of approximately €3 billion. The project aims to strengthen Greece’s capacity to detect and intercept aerial and missile threats through a unified early warning, command and control system.   The project forms part of the comprehensive modernisation of the Greek armed forces and does not replace Athens’ commitments within the North Atlantic Treaty Organization or its alliances with the United States and the European Union. The decision to establish this system reflects the changing character of regional military threats, particularly the growing reliance on unmanned aircraft and precision missiles, alongside the continuing development of Turkey’s defence industries in reconnaissance and unmanned maritime and aerial systems.   This analysis therefore examines the implications of the Greek–Israeli agreement and its place within military modernisation programmes. It assesses its potential impact on the deterrence balance between Greece and Turkey, as well as its implications for security cooperation and managing regional tensions in the Eastern Mediterranean in the period ahead.