An S-400 defense system, sent by Russia, at a joint training drill with Belarus in 2022.
An S-400 defense system, sent by Russia, at a joint training drill with Belarus in 2022.
  • Russia is likely moving expensive air defense systems from Kaliningrad to Ukraine, per UK intel.
  • Kaliningrad is one of Russia's most "strategically sensitive" Western outposts, the intel update.
  • Moving air defenses from the enclave shows how Russia has been stretched by the war, the intel said.

Russia has likely re-deployed several of its famed S-400 missile systems from Kaliningrad to the Ukrainian frontline, the UK Ministry of Defense said on Sunday.