Jonas Kjellén is a defense analyst at FOI and researches Russia's presence on the Baltic Sea and has analyzed where the Russian military units are located in Kaliningrad and what capacity they have.

Among other things, the mobile robot system Iskander, with a range of hundreds of kilometers. 

- This is a system that is often associated with tactical nuclear weapons.

It reaches far up in the Baltics, larger parts of Poland but also parts of Sweden.

Ships, aircraft and robots - See the map of Kaliningrad's military forces in the video above.