According to the U.S. assessment, Russia has expanded tactical nuclear deployments near NATO allies several times in recent years. An example is Kaliningrad, a Russian enclave between Poland and Lithuania. A State Department cable from April 2009 said Russia had warned it would take countermeasures, including putting “missiles” in Kaliningrad, in response to expanded U.S. missile defenses in Europe.
U.S. officials believe the most recent movements of Russian tactical nuclear weapons took place in late spring. In late May, a U.S. Patriot missile battery was deployed in northern Poland, close to Kaliningrad, sparking public protests from Moscow.