As of September 2013, the Russian Armed Forces had five S-400 regiments: two in Moscow, one in the Pacific fleet, one in the Baltic Fleet, and one in the Southern Military District. From 2014, the army was to receive two to three sets of regimental units of S-400 systems every year. Another S-400 regiment was to be put on combat duty around Moscow by the end of 2013. Russia plans to have 28 S-400 regiments by 2020, each comprising two or three battalions with four systems each, mainly in maritime and border areas.