On September 4-7, units from Russia, Armenia, Belarus, and Kyrgyzstan drilled together as part of the Combat Commonwealth 2017 CIS joint air defense exercise. Over 1,500 soldiers participated and multiple systems were tested, including the Pantsir S-1, S-300,  and S-400 Triumf. The drill reportedly included countering a variety of targets, from unmanned aerial vehicles to ballistic missiles. According to the Russian Ministry of Defense, all of the targets were destroyed.