The Collective Security Treaty Organization (CSTO) is a Russia-led intergovernmental military alliance.
Established in 2002, building on the Collective Security Treaty (1992) signed after the dissolution of the USSR.
Headquarters: Moscow, Russia.

History & Creation

Originates from the Collective Security Treaty (CST) signed on May 15, 1992 in Tashkent (Uzbekistan) by Armenia, Kazakhstan, Kyrgyzstan, Russia, Tajikistan, and Uzbekistan.
Later joined by Azerbaijan, Belarus, Georgia (1993).
Entered into force on April 20, 1994 after national ratifications.
Key Article 4: Aggression against one member = aggression against all → right to collective defence (in line with Article 51 of UN Charter).
In 1999, the treaty was extended → but Azerbaijan, Georgia, Uzbekistan left.
On May 14, 2002, CST gained status as an international regional organization (renamed CSTO).

Formalization

October 7, 2002: CSTO Charter approved at CIS Summit (Chisinau).
- In accordance with Article 3 of the Charter, the objectives of the Organization are the strengthening of peace, international and regional security and stability, the protection on a collective basis of the independence, territorial integrity and sovereignty of the member States.
- The charter defines the following principles by which the Organization is guided in its activities: priority of political means over the military, strict respect for independence, voluntary participation, equality of rights and obligations of the member States, non-interference in affairs falling under the national jurisdiction of the member States.
December 2003: Charter registered with the UN Secretariat.
2004: CSTO gained Observer Status in the UN General Assembly.

Membership

6 Member States: Russia, Armenia, Belarus, Kazakhstan, Kyrgyzstan, Tajikistan.
- Note: Armenia has frozen its participation in the Collective Security Treaty Organisation (CSTO) since February 2024. The country has also ceased financial contributions and engagement in CSTO activities.
Observers: Afghanistan and Serbia hold observer status.
India is not a member
Suspension: Uzbekistan was suspended in 2012;
Earlier exits: Azerbaijan, Georgia

Objectives

Ensure collective defence and regional security among member states.
Counter terrorism, extremism, separatism, cyber threats, and drug trafficking.
Conduct joint military exercises and peacekeeping operations.
Coordinate on arms supplies and military-technical cooperation.

CSTO: Contemporary Security Priorities

Focus Areas
- Combating international terrorism and extremism.
- Preventing and controlling drug trafficking.
- Addressing illegal migration and human trafficking.
- Countering criminal and destructive activities in the information space (cyber threats, disinformation).
Significance
- Strengthens collective security framework of member states.
- Addresses non-traditional and hybrid security threats beyond conventional military issues.

Governance

The Collective Security Council

It is the highest body of the Organization and consists of heads of the member States.
It considers the fundamental issues of the Organization’s activities and makes decisions aimed at the realization of its goals and objectives, as well as provides coordination and joint activities of the member States for the realization of these goals.
Sessions of the CSC are held alternately in the member States as necessary, but at least once a year.
The chairmanship of the Council is transferred in the order of the Russian alphabet, unless the Council decides otherwise.
The CSC has the right to create, on a permanent or temporary basis, the working and auxiliary bodies of the Organization.

The Council of Ministers of Foreign Affairs

It is a consultative and executive body of the Organization for the coordination of the interaction of the Member States in the field of foreign policy.

The Council of Ministers of Defense

It is a consultative and executive body of the Organization for coordinating the interaction of the Member States in the field of military policy, military construction and military-technical cooperation.

The Military Committee

It was established on December 19, 2012 at the Council of Ministers of Defense of the Collective Security Treaty Organization with a view to promptly considering the planning and use of forces and means of the collective security system of the Collective Security Treaty Organization and preparing the necessary proposals for the CMD.

The Committee of Secretaries of Security Councils

It is the consultative and executive body of the Organization for the coordination of the interaction of the Member States in ensuring their national security.

The Secretary General of the Organization

It is the highest administrative official of the Organization and administers the Secretariat of the Organization. Appointed by decision of the CSC from among the citizens of the Member States and accountable to the CSC.

The Secretariat of the Organization

It is a permanent working body of the Organization for the implementation of organizational, informational, analytical and consultative support of the activities of the bodies of the Organization.

The CSTO United Staff

It is a permanent working body of the Organization, which is responsible for preparing proposals and implementing decisions on the CSTO military component.

Military Cooperation under CSTO

Aim

Ensure collective and national security of member states by maintaining readiness, sufficient defence potential, and rapid response to threats.
Framework guided by Articles 4 & 6 of the 1992 Collective Security Treaty.

CSTO Troops (Collective Forces)

Composed of:
- Collective Operational Reaction Forces
- Regional/combined groups of troops
- Collective aviation & peacekeeping forces
- Joint military systems & infrastructure

Key Developments

Bilateral Groupings: Russian-Belarusian and Russian-Armenian troops deployed in Eastern Europe & Caucasus.
2001: Collective Rapid Deployment Forces in Central Asia (CRDF-CAR) formed (~5,000 troops).
2009: Collective Rapid Reaction Forces (CRRF) created (~20,000 troops) for military & special tasks.
2007 Agreement on Peacekeeping Activities: Established CSTO Peacekeeping Forces (~3,000 troops). Registered with the UN in 2009.

Training & Exercises

Since 2004, over 30 joint exercises have been conducted under annual plans.
Famous drills: Rubezh, Interaction, Indestructible Brotherhood, Thunder, Cobalt.
Focus on counter-terrorism, crisis response, peacekeeping, and interoperability.
Foreign countries & international organizations often participate as observers.

Peacekeeping Role

CSTO peacekeepers can be deployed within member states (CSTO Council decision) or under UN mandate.
- The CSTO Peacekeeping Forces can be used both in the area of responsibility of the Organization by the decision of the Collective Security Council, and beyond its limits under the mandate of the UN Security Council.
Cooperation with the UN Department of Peacekeeping Operations; 2012 MoU signed.
2022: Deployed in Kazakhstan to restore order during unrest → first real CSTO field mission.

International Cooperation

Partnership with UN for peacekeeping capacity.
Collaboration with the International Red Cross in humanitarian areas.

FAQs

1. What is CSTO?

The Collective Security Treaty Organization (CSTO) is a Russia-led military alliance established in 2002 to ensure collective defence and regional security among former Soviet states.

2. Which countries are members of the CSTO?

As of 2025, CSTO has 6 member states: Russia, Armenia, Belarus, Kazakhstan, Kyrgyzstan, and Tajikistan.

3. Is India a member of CSTO?

No, India is not a member of the CSTO.

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