Collective Security Treaty Organization

The Collective Security Treaty Organization (CSTO; ; ) is a government military alliance in Eurasia. Its members of some post-Soviet states. The treaty was inspired by the Soviet Armed Forces.
On 15 May 1992, six post-Soviet states belonging to the Commonwealth of Independent States, Russia, Armenia, Kazakhstan, Kyrgyzstan, Tajikistan, and Uzbekistan, signed the Collective Security Treaty.