• A coalition of 26 nations has pledged to form a multinational security force for Ukraine, contingent on a future ceasefire.
  • The initiative, co-chaired by France and the UK, is a direct response to stalled NATO membership talks and shifting U.S. foreign policy.
  • Deployment of land, sea, or air assets remains an open option but is entirely dependent on negotiations with Russia and a cessation of hostilities.

Leaders and military chiefs from 26 countries have publicly committed to forming a "reassurance force" for Ukraine, a significant move aimed at deterring further Russian aggression following a potential ceasefire. The virtual meeting on March 15, 2025, included European states, Ukraine, Turkey, Canada, Australia, New Zealand, and representatives from NATO and the EU.

France's President Emmanuel Macron and UK Prime Minister Keir Starmer are co-chairing the initiative, which diplomats describe as an effort to provide credible security guarantees for Kyiv amid a stalled NATO accession process. "All options for troop deployment and other support remain open but are contingent on the cessation of hostilities," said one official familiar with the discussions, who spoke on condition of anonymity. The coalition's size is expected to grow, with expectations it could expand to more than 30 nations.

The push for a European-led security force gained urgency following the re-election of Donald Trump and his administration's reluctance to support Article 5 commitments for Ukraine. With immediate NATO membership effectively blocked by the U.S. and Germany, European nations have moved to organize independent guarantees. The coalition insists that Ukraine must not lose agency in any peace talks and that future arrangements should enable its pathway to EU and NATO membership without a Russian veto.

While the commitment is firm, the actual deployment of any land, sea, or air assets is not imminent. A senior European diplomat stressed that the force is a planning exercise for a postwar scenario, noting that "actual deployment depends on a ceasefire and terms agreed with Russia." The group is also urging continued economic pressure on Russia via sanctions if a ceasefire cannot be reached, aiming to weaken its war economy.

For Ukrainians, the initiative is a potential lifeline, offering a promise of postwar security that is seen as essential for future economic recovery and investment. However, some analysts caution that such guarantees may offer limited practical protection unless they are underpinned by robust U.S. or wider NATO support. The proposal has also sparked a complex debate within European capitals about the risks of a direct security role in Ukraine, with concerns about escalation and the feasibility of non-NATO deployments.

The effort recalls earlier multinational coalitions but is focused on post-conflict peacekeeping rather than active combat. A final communique from the meeting emphasized continued diplomacy alongside military preparedness. Officials from several participating countries did not immediately respond to requests for further comment on specific troop contributions or timelines.