St. Petersburg is probably now Russia’s second best protected city in terms of air defense (as common sense would dictate).
Interfaks-AVN reported today that another regiment of the Western MD’s 2nd Air Defense Division in Leningrad oblast has completed training with the S-400 to include combat firings against Favorit targets (the 5V55 missile from the S-300P system).
The regiment, likely the 1489th SAM Regiment, has returned to its home base of Vaganovo ENE of StP. It’s supposed to begin combat duty in February 2020, according to Interfaks-AVN.
The 500th SAM Regiment at Gostilitsy WSW of StP got its S-400s in 2015. The 1488th at Zelenogorsk NW of StP in 2016, the 1490th at Ulyanovka SE of StP probably in 2017, and the 1544th at Vladimirskiy Lager (but launch battalions split between Luga and Strugi Krasnyye) S of StP in 2018.
So not only is the 2nd ADD now all S-400, it’s also a five-regiment SAM division.
Here’s a handy reference to S-400 deployments (which have been difficult to keep up on). No wonder Mr. Putin wants to unplug the Internet and get rid of ru.wikipedia.org.