Kirill Krivosheev writes for Carnegie Moscow Center: The Collective Security Treaty Organization (CSTO)—a military alliance of Russia, Belarus, Armenia, Kazakhstan, Kyrgyzstan, and Tajikistan—has never enjoyed great popularity, either among its six member states or beyond. The issue is not that it costs a lot for its members, or that it has an aggressive expansionist policy. The reason is far more banal: quite simply, there is little awareness of it.
go to the analysis: Does the Collective Security Treaty Organization Have a Future? – Carnegie Moscow Center – Carnegie Endowment for International Peace