British Challenger 2 tanks prowl the Polish countryside. Elite French special forces troops keep watch on Romania’s Black Sea coast. US missile batteries scan the skies of Slovakia. A Norwegian F-35 scrambles to intercept an unidentified Russian aircraft that appears off the coast of Finland.
As battle rages in Ukraine, Nato allies along the alliance’s eastern flank have collectively embarked on the most significant — and rapid — military deployment in the history of modern Europe: a state of alert and readiness short of war, but also far from peace.
Vladimir Putin’s invasion of Ukraine has wrenched Europe and Nato back to a scenario that it thought it had consigned to the past.