Opposition Groups Call For Armenia's Withdrawal From CSTO On Eve Of Yerevan Summit November 23, 2022 at 1:09 am News Armenian News Tweet Share Reddit +1 Pocket LinkedIn A pro-Western opposition alliance staged a protest in Yerevan on November 22 calling for Armenia’s exit from the Collective Security Treaty Organization (CSTO) ahead of a summit of the Moscow-led defense bloc in the Armenian capital.