Russia is ready to accept Iran and the United States into the CSTO Exactly fifteen years ago, on May 15, 1992, on the ruins of the Soviet Union, nine states (Tajikistan, Kyrgyzstan, Kazakhstan, Uzbekistan , Russia, Georgia, Azerbaijan, Belarus, Armenia) signed the Collective Security Treaty in Tashkent . In essence, an agreement was adopted on the formation of a Eurasian collective security system. This is how the Collective Security Treaty Organization (CSTO) came into being.