L'association européenne des sous-officers de réserve (AESOR) was founded on June 1st 1963 at the naval base of Toulon (France) by representatives of the NCO associations of Belgium, France, Germany, Luxembourg and Switzerland.
On February 22nd 2013, the association changed its name by unanimous vote of its then 12 members. The new name is Confédération Interalliée des Sous-Officiers de Réserve (CISOR).
CISOR is composed of one Reserve NCO Association per member nation. Membership is subject to presenting a copy of the associations's Statute and internal Regulations, together with introduction letters from the nation's Ministry of Defense and/or General Staff of the Armed Forces.
- CISOR provides reserve NCOs opportunities to learn by sharing experiences and cultures, enhance their professional development and exercise their military skills in an international environment.
- CISOR strengthens the national reservist associations by giving them a higher international visibility and attractiveness.
- CISOR contributes to the readiness and capability of the armed forces of member nations through increased knowledge and cooperation with allied militaries, military exercises, and increased value and motivation of reserve NCOs.