A head-and-shoulders view of Russian President Vladimir Putin, right, and Armenian Prime Minister Nikol Pashinyan, both in dark suits and looking in different directions, in Kazakhstan in October 2022.
Russian President Vladimir Putin and Armenian Prime Minister Nikol Pashinyan in Kazakhstan in October 2022.
  • Armenia's prime minister said he's taking his country out of the Collective Security Treaty Organization.
  • The CSTO, a military alliance of post-Soviet states, is considered Putin's answer to NATO.
  • But tensions have been growing, and this is only the latest clash among Russia's supposed allies.

A key Russian ally said it is quitting the Collective Security Treaty Organization, a group widely considered to be President Vladimir Putin's answer to NATO.