Currently Armenia hosts a Russian military base equipped with S-300 air defense complexes and MiG-29 interceptor fighter jets. Russia’s Erebuni base is part of the unified air defense system of ex-Soviet republics known as the CIS. It was formed in 1995 and is situated some 126 kilometers to the north of the Armenian capital, Yerevan. According to an intergovernmental agreement, Russian military will stay in Armenia till 2044. The number of military personnel at the Erebuni airfield and 102nd Military Base in Gyumri reportedly varies between 4,000 and 5,000.