According to the plan for joint training of management bodies and formations of forces and means of the CSTO Collective Security System for 2021,on April 15 to 16 the working group of the RA Ministry of Defence participates in the first staff negotiations on the preparation and conduct of special military exercises within the framework of the joint operational-tactical exercises "Combat Brotherhood-2021" - the tactical-professional exercise "Search", "Interaction" of the collective rapid reaction forces, "Indestructible Brotherhood" of Peacekeeping Forces and "Echelon" of material and technical support Forces.