“We have always kind of suspected that this is the only existential threat that we have,” Maj. Gen. Veiko-Vello Palm, the commander of the Estonian Army’s main land combat division, said of a possible Russian invasion. That the exercise is a test of how NATO forces would respond to a Russian invasion has rattled nerves in border states, particularly the Baltics and Nordics. Taken together, “that is overcharging these broader concerns about Russia,” Mr. Skaluba said. On the same day, President Sauli Niinistö of Finland sought to calm concerns prompted by reports that one Steadfast Defender scenario will test how NATO would respond to a Russian invasion of Finland. For many Estonians, he said, “It’s only a question of when.”The post For Europe and NATO, a Russian Invasion Is No Longer Unthinkable appeared first on New York Times.