Moldova’s Outsized Importance for European Security

Russia’s full-scale invasion of Ukraine has transformed Moldova from a peripheral EU “neighborhood” country into a frontline state. Russian drones aimed at Ukraine now cross Moldovan airspace almost nightly. On the night of 15 to 16 October alone, Moldova’s Defense Ministry recorded four incursions, and Moldovan authorities have counted eight air space violations in a single week.

The pressure is not purely military; Moscow has used energy as a weapon, most visibly when Gazprom cut supplies to Transnistria in January 2025 and left Chișinău to manage the fallout. Hybrid electoral interference, from vote-buying networks to coordinated disinformation, cast a shadow on both the 2024 EU referendum and the 2025 parliamentary elections. Around 1,500 Russian troops remain stationed in Transnistria, roughly 100 kilometers from Odesa.

Moldova’s EU accession process will help determine whether Moscow’s pressure on Moldova succeeds. It can consolidate Moldova’s place in Europe and make it a stable anchor on Ukraine’s southwestern flank. On the other hand, it can become a slow, costly, and politically contested process that provides Russia with an opening to turn Moldova into a source of leverage over Ukraine and a test of the limits of EU enlargement as a security instrument.

Membership as a Security Option

Moldova’s constitution enshrines permanent neutrality, and NATO membership is not on the table. That leaves the EU as the only major Western bloc with a security dimension that Chișinău can realistically join. As a result, Moldova increasingly treats EU membership not only as a governance and economic project but also as its main strategic security option.

EU institutions and member states now echo that logic. Chișinău and Brussels both speak of a unique window of opportunity in which enlargement has again become a strategic investment in Europe’s stability and security. The European Commission goes further, recognizing that Moldova is already contributing to European security, not only in the military sphere but also in energy security and countering foreign interference.

In practice, the EU has become one of Moldova’s most important external supporters in security and defense, even if this help falls short of a formal defense guarantee. In July, the Council adopted a €120 million European Peace Facility (EPF) measure to finance a mid-range air defense system, bringing total EPF support for Moldova to €317 million. That single measure exceeds Moldova’s entire annual defense budget, which official figures put at nearly 2 billion lei, or roughly €100 million, this year.

Chișinău is doing its part. Defense spending has more than doubled since 2022, and the military strategy for 2025 to 2035 targets 1% of GDP by 2034. Even so, Moldova will depend on partners for the capabilities that matter most against drones and missiles for years to come.

Momentum and Its Limits

The EU accession process itself could push Moldova in either direction. The momentum is real. On October 13, 2026, the EU opened two clusters, or thematic groups of negotiating chapters, in its accession negotiations with Moldova. These new clusters cover the internal market and competitiveness and inclusive growth. This action came after Hungary lifted a veto that was aimed at Ukraine but also held back Moldova, since the EU has advanced the two candidates as a package. It brings the number of chapters open for negotiation to 24 of 33. The government aims to finish technical talks by 2028 and join by 2030, a timeline Brussels considers achievable.

But the remaining distance is the hardest. The clusters still unopened, on the green agenda and on agriculture and cohesion, carry the heaviest adjustment costs for Moldova’s farmers and small businesses. Every reform creates losers whom Russian-backed actors are eager to recruit, as the 2025 elections and the current campaign in Gagauzia show.

Moldova’s accession also depends on unanimity among the EU’s 27 member states. The relief of October 13 proved short-lived. A week later, Budapest blocked the procedural step needed to open the two remaining clusters, again for both candidate countries and without explanation. EU officials still expect those clusters to open in December, but the episode confirms that one capital’s dispute with one candidate country in a pair can freeze the process for the other as well. A process that stalls, or appears to reward geopolitics over merit, would erode the narrow pro-European majority that carried the 2024 referendum with just over 50%.

Discussions with Moldovan officials during a recent visit showed how policymakers now frame the stakes. They increasingly link accession to Ukraine’s security. In their view, a Moldova anchored in the EU would narrow Russia’s options for using Transnistria and the country’s south to pressure Odesa and Ukraine’s access to the sea. Membership would not by itself remove Russian troops, restore Chișinău’s control over Transnistria or end sabotage and coercion aimed at Odesa. But it would deny Moscow a weak and contested flank from which to apply that pressure.

They also tie it to the future of the Black Sea region, where Moldova, Romania, and Ukraine increasingly form a single strategic space along the Danube and the Odesa corridor. Above all, they see Moldova as a test of the EU’s credibility as a geopolitical actor. If Brussels cannot bring in a small, reform-minded candidate, its promises to larger and more complicated ones will ring hollow.

A Test Case for Enlargement as Security Policy

Moldova is becoming a key test of whether EU enlargement can function as security policy. Cyprus joined in 2004 with an unresolved territorial conflict, but in a very different context. If a small, committed candidate with a frozen conflict and Russian troops on its territory can be integrated on a credible timeline while a war rages next door, it would offer important lessons for Ukraine. It would show that an unresolved conflict need not be a permanent bar to membership, and that the EU can protect as well as reform.

To make that case credible, the EU should tie its security support more closely to the accession track rather than run it in parallel. EPF assistance, the 2024 Security and Defence Partnership, and the membership negotiations are still managed by different institutions on different timelines. The negotiating chapter on foreign, security, and defense policy, opened in July 2026 as part of the external relations cluster, offers a natural vehicle. Building concrete benchmarks on defense reform, interoperability, and resilience into that chapter, and into the accession roadmap the Commission is preparing, would show Moldovans that the accession path already delivers tangible security gains. The EU’s mutual assistance clause will apply only once Moldova is a member, which makes visible protection along the way all the more important.

If the process stalls, Moscow gains a narrative of European indifference and a foothold in Europe’s eastern flank at minimal cost. The window European leaders keep describing is open now. The cheapest moment to secure Moldova is while it remains so.

This brief draws on discussions held at the Moldova Security Forum, held in Chișinău on October 8–9 2026. GMF co-organized the forum and hosted a dedicated panel titled “Inside Russia’s Playbook: How Regime Survival Drives Operations Abroad”. It also  co-organized with ECFR a high-level study visit to Moldova on October 7–9. The visit received local support from the Platform for Security and Defense Initiatives. The delegation met with the prime minister, the president, and other key ministers.

The views expressed herein are those solely of the author(s). GMF as an institution does not take positions.