The Collective Rapid Reaction Force (Russian: Коллективные силы оперативного реагирования, КСОР; KSOR) is a joint combined arms task force comprising independent military units from the Collective Security Treaty Organization member states.

CRRF was created in 2009 with the general purpose to counter a limited military aggression against CSTO member states, to fight against terrorism and drug trafficking.

The agreement on the creation of the Collective Rapid Reaction Force was signed by the presidents of all CSTO states except Belarus during a summit in Moscow on February 4, 2009.

The first joint exercises of CRRF were held in October 2009 at Matybulak firing range in Kazakhstan near the border with China.

[3] The Chiefs of the Joint Staff of the CSTO with their concurrent positions in the armed forces:[4]