Interallied  Confederation
of  Reserve Officers

Confédération   Interalliée
des  Officiers de Réserve

World’s largest and oldest military reserve officer organization committed to advise and support NATO on Reserve matters, promote Reserve Service and foster professional development of reserve Officers.


To support the policies of NATO and assist in the achievement of the Alliance’s objectives.

CIOR is a voice for reserve issues to the NATO Alliance and provides advice on the best utilization of reserve forces in a variety of operational settings, in addition to studying and promoting harmonization in the roles, duties and rights of reservists in Allied nations.

Promote the role and importance of reserves in NATO and National level

CIOR raises awareness of contemporary reserve issues by bringing its collective expertise to promote and enhance cooperation and interoperability amongst reserve forces within the Alliance and its partners.

Foster the professional development of reserve Officers

CIOR is an organization committed to professional development, and provides a variety of high-caliber and cost-effective programs that benefit individual Reservists, their member nations, and NATO as a whole.


Interallied Confederation of Reserve Officers

Founded in 1948 by the reserve officer associations of Belgium, France and the Netherlands.

Commonly referred to by its French acronym CIOR (Confédération Interalliée des Officiers de Réserve) is a formal NATO-affiliated, non-political and non-profit umbrella organization of member nations’ National Reserve Associations.
CIOR represents the interests of 1.3 million reservists across 34 participating nations within and beyond NATO, making it the world’s largest military reserve officers organization. 

CIOR is structured around a constitution that provides for a rotating Presidency; Executive Council; key Committees and several annual events that promote training, education and professional development.



Founded in



1.3 mln




Military Competition

3-day competition designed to test all of the key infantry skills - shooting, obstacle course, utility swimming and orienteering with additional tasks like range estimation, map reading and hand grenade throwing.

Young Reserve Officers Programme

YRO seminar and YRO workshop are designed to be a junior Reserve Officer’s first exposure to a multinational environment of NATO and to increase awareness of Alliance security issues.

Civil-Military Cooperation Exercise

3-day table-top Civil-Military Cooperation Exercise demonstrating Civil-Military liaison skills, collaboration and information sharing on emerging NATO challenges and promoting best practices and professional development.

Cior Language Academy

Intensive, 2-week course that teaches English and French as a second language with STANAG testing at the end of the course.

International Cyber Event

Event which provides a secure and safe environment to share experiences and information regarding military and civilian cyber, in order to facilitate cybersecurity support to NATO members during cyber operations.

CIOR Symposium

1-day symposium on Reserve issues with speakers at the highest political, military, and academic levels. The speakers address issues such as mobilization and Reserve readiness, demobilization and repatriation of Reservists to their home countries and civilian jobs and appropriate utilization of civilian specialists for peace support operations.

CIOR Winter Seminar

3-day academic conference that serves as a platform for current geopolitical issues with a specific emphasis on the relevance of Reservists.


CIOR represents 34 participating nations

CIOR has 28 member and 6 associate countries which are represented by their National Reserve Officers Associations.

Only NATO member countries can be CIOR members, however, other countries can be associates.
Every CIOR member country is represented by one organisation which must be endorsed by the country’s MoD with confirmation that this is the sole organisation representing all their Reserves.


CIOR President met with Estonian Military Representative in NATO to discuses NATO's new Reserve Forces Policy

Following the Military Committee in Permanent Session on 25 Jan 24, it was agreed that IMS Policy & Capabilities (P&C) Division would initiate a project to revitalise the Alliance approach to Reserve and Reserve Forces. Initially, this will take the form of reinstating the NATO Policy on Reserves including a review of current MC documents related to affiliated Reserve organisations.

IBM in Tallinn ended with visit to exercise Spring Storm

CIOR´s In Between Meeting last week ended with visit to Estonia´s largest annual exercise Spring Storm. Reserve officers from 12 countries received an overview on exercise and met reservists taking part of it.

CIOR´s next IBM in Tallinn almost here

CIOR´s next In Between Meeting (IBM) will take place in Tallinn, Estonia from 9 to 11th May.

CIOR President visited Kyiv to discuss Ukraine's membership in CIOR

CIOR President met with the Defence minister of Ukraine, Mr. Rustem Umerov, 22 March to discuss possible steps for Ukraine to become an associate member of CIOR.

Major Andre Lilleleht received a high national award

On February 21st president of Estonia, Mr. Alar Karis awarded the Order of the Cross of the Eagle IV class to Major Andre Lilleleht, Secretary General of CIOR.

Speech to NATO Reserve Officers At the Interallied Confederation of Allied Officers Mid-Winter Meeting 1 February 2024 NATO HQ, Brussels

Ladies and Gentlemen, officers.

It’s an honor to be invited to speak here today in front of the men and women who understand what collective defense means and the importance of the alliance that has maintained the peace in Europe for 75 years. This is especially true in 2024 when many have doubts about the future of the alliance and at a time when Europe faces a greater threat to its security since the darkest days of the Cold War. Even then, when I was at Radio Free Europe in Munich Germany and when massive NATO exercises were just part of living in Europe, we did not have an ongoing massive invasion and war on the continent. Nor did we hear threats to invade, bomb and otherwise attack Europe.

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