Collective Security Treaty Organization

Collective Security Treaty Organization, or CSTO, is a group of countries that work together to make sure their borders are safe from outside threats. It is like a group of friends who all agree to watch out for each other in case someone is trying to do something bad. The members of CSTO work together to share information and ideas, and they even have a system of helping each other if a member is attacked. This way, no one country is left alone to face a threat.