“We are implementing the biggest reinforcement of our collective defense since the end of the Cold War,” NATO’s secretary general, Jens Stoltenberg, said before a meeting of defense ministers in Brussels on Thursday.
Western officials have been alarmed by the speed and scale of Russia’s intervention in Syria.
Russia’s warplanes have violated Turkish airspace — deliberately so, NATO officials say. And its warships in the Caspian Sea have fired cruise missiles at targets in Syria — though several seem to have fallen short of their mark, landing somewhere in Iran, a senior American defense official says.
Under NATO’s treaty, an attack on one member nation is considered an attack on all, and the countries are committed to protect each other.