|title=Roundtable Blog: Toward Enforceable Security Guarantees |access-date=31 October 2025}}</ref>
|title=Roundtable Blog: Toward Enforceable Security Guarantees |access-date=31 October 2025}}</ref>
==Formation, founding directives, participation==
==Creation==
==Organization and command structure==
==Organization and command structure==
As Multinational Force Ukraine is not a treaty-based entity, membership status is conferred by representation at coalition meetings. As of December 2025, Japan was the latest country that joined MNF-U (in August), which is operationally inactive but remains in advanced planning and open for contributors to join. The force size and operational areas of responsibility are yet to be determined.
International law and peace enforcement framework for Ukraine
The legal architecture for the MNF–U’s peacekeeping mission is evolving in the shadow of UN precedent and international law.[1][2] Deployment is to occur only with a comprehensive, signed ceasefire or peace deal, respecting Ukraine’s sovereignty and the norms prohibiting intervention in active conflicts without host-country consent. Rules of engagement, status of forces, and chain of command are being negotiated in detail, taking lessons from previous ‘coalitions of the willing‘.[a][5]
As of October 2025[update], lack of specific ‘reassurance force in Ukraine’ legal analysis highlights the risks of ambiguity in force mandate, especially in the context of ‘robust peace enforcement‘ (as opposed to traditional peacekeeping).[6][7][8]
Outline
Background
The Multinational Force–Ukraine (MNF–U), also referred to as the deterrence and reassurance force, is a proposed international political and military coalition formed in response to the Russo-Ukrainian War. Its primary objective is to support Ukraine’s sovereignty and security through deterrence, reassurance, and post-war stabilization efforts.
Creation
As of December 2025[update] MNF–U, though not formally inaugurated, is a security-providing organization of the Coalition of the willing. It was featured, particularly, at the event in Kyiv on May 10, 2025 with several political leaders, including Emmanuel Macron, President of France, Volodymyr Zelensky, President of Ukraine, Keir Starmer, Prime Minister of the United Kingdom, Friedrich Merz. and Donald Tusk.
The coalition evolved from sixteen founding nations (and two organizations) in March to 33-member-state entity as of December 2025.
Founders included:
The MNF–U is described as a non-CSDP flexible armed force, designed to operate outside the EU’s Common Security and Defence Policy framework.
Expected mission and objectives
The MNF–U’s stated mission includes:
- Strengthening Ukraine’s defense capabilities across land, sea, and air domains
- Designing post-war security guarantees for Ukraine
- Supporting peace efforts during the Russo-Ukrainian war
The organization is non-standing army and ad hoc in nature, with planning considered to be in an advanced stage as of 2025.
- Contributors and Partners
- United States
- European Union Military Assistance Mission in support of Ukraine (EUMAM UA)
- National Security and Assistance Taskforce Ukraine (NSATU)
- United Nations Security Assistance Group–Ukraine (SAG-U)
- Opposing Entities
- Belarus
- Iran
- North Korea
- Armed Forces of the Russian Federation
Background
MNF-U is a Coalition’s stabilization and peacekeeping future force with 33 nation-contributors, formalized in October 2025 by France and the United Kingdom. Conceived as a rapid deployment force in response to the ceasefire in Russo‑Ukrainian War, if comprehensively agreed, it is to operate with English as its working language and under extended multinational agreements. Coalition’s expected mandate to support a comprehensive ceasefire and post-war stabilization in Ukraine includes military logistics, training, force generation, naval mine‑clearing, and air policing.[9]
Its planned command structure is divided between a joint command headquarters in Paris and a coordination headquarters in Kyiv, with a French three‑star commander in Paris and a British two‑star deputy in Kyiv. As of November 2025[update], MNF‑U remains in the planning phase, with deployment to follow the cessation of hostilities.[10]The MNF-U’s structure, mandate, and legitimacy have quickly become points of discussion not only among governments but also within the media and academic communities across Europe and beyond.[11]
Formation, founding directives, participation
Organization and command structure
Structure and command
The military structure of the Multinational Force–Ukraine is organized under the designation COM MNF-U. Political leadership is provided by France and the United Kingdom. Military command is assigned to a three-star divisional general from France with rotation to a UK general officer in 12 months.
Headquarters are distributed across Paris, France, Northwood, United Kingdom, and Kyiv, Ukraine. The coalition was founded on 2 March 2025 in London, with MNF-U operational dates pending a ceasefire agreement.
Organization
Contributors
Member States and Organizations
Notes
- ^ As of November 2025[update], the main discussion points in academia on security studies are:
-
- Mandate ambiguity for a reassurance force in Ukraine
- Peacekeeping versus peace enforcement
-Consent and sovereignty; -Authority to use force
-
- Current proposals and political signals shaping the mandate
-Coalition commitments: as of early September 2025, 26 countries publicly committed to a reassurance force contingent on a ceasefire or peace deal, signaling breadth of political support but not resolving the legal basis or full operational scope;[3]
-Force composition and options; -Willing contributors; -Security guarantees landscape-
- Rules of engagement, status of forces, and chain of command
-Rules of engagement (ROE); -Status of forces agreements (SOFAs); -Command and control (2C)
-
- Managing the peace enforcement versus peacekeeping tension
-Mandate drafting; -Consent architecture: to anchor the mission in Ukraine’s formal invitation and parliamentary authorization (According to Ukraine’s Prime Minister’s Office statement on 10 July 2025, Ukraine is ready to issue an invitation to the force and enter into formal agreements with participating nations as and when necessary), complemented by the coalition parliamentary approvals and harmonized national caveats annexed to the mandate. If UNSC authorization is infeasible, transparency and legality via public instruments, SOFAs, and ROE publication (to the extent possible) bolster legitimacy;[4]
-Escalation ladders and accountability-
- Practical risks and mitigation steps
-
References
- ^ Developments and Trends in Multilateral Peace Operations, 2024 (Report). Stockholm International Peace Research Institute. May 2025. Retrieved 3 November 2025.
- ^
- The Future of Peacekeeping: New Models and Related Capabilities (PDF) (Report). United Nations Department of Peace Operations. October 2024. Retrieved 3 November 2025.
- Joachim A. Koops, Martina Dal Dosso (ed.). “The Future of United Nations Peace Operations” (PDF). United Nations Peacekeeping, GAPO. Retrieved 3 November 2025.
- Hansen, Annika S.; Hansen, Wibke; von Gienanth, Tobias; Benkler, Monika; Pietz, Tobias; Waehlisch, Martin (February 2025). Five Trends in UN Peace Operations and Five Calls to Action (Report). Berlin: Zentrum für Internationale Friedenseinsätze (ZIF). Retrieved 3 November 2025.
[…]the return of inter-state war, signified most notably by Russia’s invasion of Ukraine, has had a significant impact on international peace and security.
- ^ Vialko, Daryna (31 October 2025). “Ukraine’s MFA comments on Coalition of the Willing meeting in Spain”. RBC Ukraine. Retrieved 1 November 2025.
- ^ Skrypchenko, Maksym (20 October 2025). “Ukraine does not need a NATO Article 5-like guarantee”. Al Jazeera. Retrieved 31 October 2025.
- ^
- Black, Edward (30 April 2025). “Commentary: United Nations Peacekeeping for Ukraine Under Scrutiny”. RUSI. Retrieved 26 October 2025.
- Barry, Ben; Kennon, Jonty; Barrie, Douglas; Childs, Nick; Hackett, James; Boyd, Henry; Bentham, Jonathan; Naradichiantama, Dzaky; Tong, Michael (31 March 2025). “A European Reassurance Force for Ukraine: Options and Challenges” (PDF). IISS. Retrieved 26 October 2025.
- ^ Samus, Mykhailo (10 September 2025). “Multinational Forces in Ukraine as a Cure for Europeans’ Fear”. New Geopolitics Research Network. Retrieved 7 October 2025.
- ^ “Zaluzhny says European security depends on Ukraine’s resolve and true partnership”. Interfax-Ukraine. 21 October 2025. Retrieved 26 October 2025.
- ^ Bernacchi, Giulia (22 October 2025). “UK Could Pledge Over $133M for Multinational Force in Ukraine: Report”. The Defense Post. Retrieved 27 October 2025.
- ^
- “Chairs’ statement following 24 October Coalition of the Willing Leaders’ meeting” (Press release). European Council. 24 October 2025. Retrieved 25 October 2025.
They confirmed that plans are in place to deploy a Multinational Force Ukraine once hostilities have ceased, with a view to help secure Ukraine’s skies and seas and regenerate Ukraine’s armed forces.
- “‘Coalition of Willing’ leaders set out stance on Ukraine ceasefire pathway”. 13 August 2025. Retrieved 13 August 2025 – via Reuters.
The Coalition of the Willing is ready to play an active role, including through plans by those willing to deploy a reassurance force once hostilities have ceased.
- “Chairs’ statement following 24 October Coalition of the Willing Leaders’ meeting” (Press release). European Council. 24 October 2025. Retrieved 25 October 2025.
- ^ Allison, George (6 September 2025). “UK to lead headquarters of Multinational Force Ukraine”. UK Defence Journal. Retrieved 27 October 2025.
The intent is for the three star command of the Multinational Force Ukraine to remain joint between UK and France [after HQ rotation from Paris to London]. This will be reviewed once the detail of any ceasefire is known.
- ^ “Roundtable Blog: Toward Enforceable Security Guarantees”. Public International Law & Policy Group. 6 October 2025. Retrieved 31 October 2025.
